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the city water supply. Not anymore!”

Brüder lowered his phone, glaring at their guide. “What?”

“In ancient times, the cistern held the water supply,” Mirsat clarified. “But no longer. We modernized.”

Brüder came to a stop under a sheltering tree, and everyone halted with him.

“Mirsat,” Sinskey said, “you’re sure that nobody drinks the water out of the cistern?”

“Heavens no,” Mirsat said. “The water pretty much just sits there … eventually filtering down into the earth.”

Sinskey, Langdon, and Brüder all exchanged uncertain looks. Sinskey didn’t know whether to feel relieved or alarmed. If nobody comes in regular contact with the water, why would Zobrist choose to contaminate it?

“When we modernized our water supply decades ago,” Mirsat explained, “the cistern fell out of use and became just a big pond in an underground room.” He shrugged. “These days it’s nothing more than a tourist attraction.”

Sinskey spun toward Mirsat. A tourist attraction? “Hold on … people can go down there? Into the cistern?”

“Of course,” he said. “Many thousands visit every day. The cavern is quite striking. There are boardwalks over the water … and even a small café. There’s limited ventilation, so the air is quite stuffy and humid, but it’s still very popular.”

Sinskey’s eyes locked on Brüder, and she could tell that she and the trained SRS agent were picturing the same thing—a dark, humid cavern filled with stagnant water in which a pathogen was incubating. Completing the nightmare was the presence of boardwalks over which tourists moved all day long, just above the water’s surface.

“He created a bioaerosol,” Brüder declared.

Sinskey nodded, slumping.

“Meaning?” Langdon demanded.

“Meaning,” Brüder replied, “that it can go airborne.”

Langdon fell silent, and Sinskey could see that he was now grasping the potential magnitude of this crisis.

An airborne pathogen had been on Sinskey’s mind as a possible scenario for some time, and yet when she believed that the cistern was the city’s water supply, she had hoped maybe this meant that Zobrist had chosen a water-bound bioform. Water-dwelling bacteria were robust and weather-resistant, but they were also slow to propagate.

Airborne pathogens spread fast.

Very fast.

“If it’s airborne,” Brüder said, “it’s probably viral.”

A virus, Sinskey agreed. The fastest-spreading pathogen Zobrist could choose.

Releasing an airborne virus underwater was admittedly unusual, and yet there were many life-forms that incubated in liquid and then hatched into the air—mosquitoes, mold spores, the bacterium that caused Legionnaires’ disease, mycotoxins, red tide, even human beings. Sinskey grimly pictured the virus permeating the cistern’s lagoon … and then the infected microdroplets rising into the damp air.

Mirsat was now staring across a traffic-jammed street with a look of apprehension on his face. Sinskey followed his gaze to a squat, red-and-white brick building whose single door was open, revealing what looked to be a stairwell. A scattering of well-dressed people seemed to be waiting outside under umbrellas while a doorman controlled the flow of guests who were descending the stairs.

Some kind of underground dance club?

Sinskey saw the gold lettering on the building and felt a sudden tightness in her chest. Unless this club was called the Cistern and had been built in A.D. 523, she realized why Mirsat was looking so concerned.

“The sunken palace,” Mirsat stammered. “It seems … there is a concert tonight.”

Sinskey was incredulous. “A concert in a cistern?!”

“It’s a large indoor space,” he replied. “It is often used as a cultural center.”

Brüder had apparently heard enough. He dashed toward the building, sidestepping his way through snarled traffic on Alemdar Avenue. Sinskey and the others broke into a run as well, close on the agent’s heels.

When they arrived at the cistern entrance, the doorway was blocked by a handful of concertgoers who were waiting to be let in—a trio of women in burkas, a pair of tourists holding hands, a man in a tuxedo. They were all clustered together in the doorway, trying to keep out of the rain.

Sinskey could hear the melodic strains of a classical music composition lilting up from below. Berlioz, she guessed from the idiosyncratic orchestration, but whatever it was, it felt out of place here in the streets of Istanbul.

As they drew closer to the doorway, she felt a warm wind rushing up the stairs, billowing from deep inside the earth and escaping from the enclosed cavern. The wind brought to the surface not only the sound of violins, but the unmistakable scents of humidity and masses of people.

It also brought to Sinskey a deep sense of foreboding.

As a group of tourists emerged from the stairs, chatting happily as they exited the building, the doorman allowed the next group to descend.

Brüder immediately moved to enter, but the doorman stopped him with a pleasant wave. “One moment, sir. The cistern is at capacity. It should be less than a minute until another visitor exits. Thank you.”

Brüder looked ready to force his way in, but Sinskey placed a hand on his shoulder and pulled him off to one side.

“Wait,” she commanded. “Your team is on the way and you can’t search this place alone.” She motioned to the plaque on the wall beside the door. “The cistern is enormous.”

The informational plaque described a cathedral-size subterranean room—nearly two football fields in length—with a ceiling spanning more than a hundred thousand square feet and supported by a forest of 336 marble columns.

“Look at this,” Langdon said, standing a few yards away. “You’re not going to believe it.”

Sinskey turned. Langdon motioned to a concert poster on the wall.

Oh, dear God.

The WHO director had been correct in identifying the style of the music as Romantic, but the piece that was being performed had not been composed by Berlioz. It was by a different Romantic composer—Franz Liszt.

Tonight, deep within the earth, the Istanbul State Symphony Orchestra was performing one of Franz Liszt’s most famous works—the Dante Symphony—an entire composition inspired by Dante’s descent into and return from hell.

“It’s being performed here for a week,” Langdon said, scrutinizing the poster’s fine print. “A free concert. Underwritten by an anonymous donor.”

Sinskey suspected that she could guess the identity of the anonymous donor. Bertrand Zobrist’s flair for the dramatic, it seemed, was also a ruthless practical strategy. This week of free concerts would lure thousands more tourists than usual down into the cistern and place them in a congested area … where they would breathe the contaminated air, then travel back to their homes both here and abroad.

“Sir?” the doorman called to Brüder. “We have room for a couple more.”

Brüder turned to Sinskey. “Call the local authorities. Whatever we find down there, we’ll need support. When my team arrives, have them radio me for an update. I’ll go down and see if I can get a sense of where Zobrist might have tethered this thing.”

“Without a respirator?” Sinskey asked. “You don’t know for a fact the Solublon bag is intact.”

Brüder frowned, holding his hand up in the warm wind that was blowing out of the doorway. “I hate to say this, but if this contagion is out, I’m guessing everyone in this city is probably infected.”

Sinskey had been thinking the same thing but hadn’t wanted to say it in front of Langdon and Mirsat.

“Besides,” Brüder added, “I’ve seen what happens to crowds when my team marches in wearing hazmat suits. We’d have full-scale panic and a stampede.”

Sinskey decided to defer to Brüder; he was, after all, the specialist and had been in situations like this before.

“Our only realistic option,” Brüder told her, “is to assume it’s still safe down there, and make a play to contain this.”

“Okay,” Sinskey said. “Do it.”

“There’s another problem,” Langdon interjected. “What about Sienna?”

“What about her?” Brüder demanded.

“Whatever her intentions may be here in Istanbul, she’s very good with languages and possibly speaks some Turkish.”


“Sienna knows the poem references the ‘sunken palace,’ ” Langdon said. “And in Turkish, ‘sunken palace’ literally points …” He motioned to the “Yerebatan Sarayi” sign over the doorway. “… here.”

“That’s true,” Sinskey agreed wearily. “She may have figured this out and bypassed Hagia Sophia altogether.”

Brüder glanced at the lone doorway and cursed under his breath. “Okay, if she’s down there and plans to break the Solublon bag before we can contain it, at least she hasn’t been there long. It’s a huge area, and she probably has no idea where to look. And with all those people around, she probably can’t just dive into the water unnoticed.”

“Sir?” the doorman called again to Brüder. “Would you like to enter now?”

Brüder could see another group of concertgoers approaching from across the street, and nodded to the doorman that he was indeed coming.

“I’m coming with you,” Langdon said, following.

Brüder turned and faced him. “No chance.”

Langdon’s tone was unyielding. “Agent Brüder, one of the reasons we’re in this situation is that Sienna Brooks has been playing me all day. And as you said, we may all be infected already. I’m helping you whether you like it or not.”

Brüder stared at him a moment and then relented.

As Langdon passed through the doorway and began descending the steep staircase behind Brüder, he could feel the warm wind rushing past them from the bowels of the cistern. The humid breeze carried on it the strains of Liszt’s Dante Symphony as well as a familiar, yet ineffable scent … that of a massive crush of people congregated together in an enclosed space.

Langdon suddenly felt a ghostly pall envelop him, as if the long fingers of an unseen hand were reaching out of the earth and raking his flesh.

The music.

The symphony chorus—a hundred voices strong—was now singing a well-known passage, articulating every syllable of Dante’s gloomy text.

“Lasciate ogne speranza,” they were now chanting, “voi ch’entrate.”

These six words—the most famous line in all of Dante’s Inferno—welled up from the bottom of the stairs like the ominous stench of death.

Accompanied by a swell of trumpets and horns, the choir intoned the warning again. “Lasciate ogne speranza voi ch’entrate!”

Abandon all hope, ye who enter here!


Bathed in red light, the subterranean cavern resonated with the sounds of hell-inspired music—the wail of voices, the dissonant pinch of strings, and the deep roll of timpani, which thundered through the grotto like a seismic tremor.

As far as Langdon could see, the floor of this underground world was a glassy sheet of water—dark, still, smooth—like black ice on a frozen New England pond.

The lagoon that reflects no stars.

Rising out of the water, meticulously arranged in seemingly endless rows, were hundreds upon hundreds of thick Doric columns, each climbing thirty feet to support the cavern’s vaulted ceiling. The columns were lit from below by a series of individual red spotlights, creating a surreal forest of illuminated trunks that telescoped off into the darkness like some kind of mirrored illusion.

Langdon and Brüder paused at the bottom of the stairs, momentarily stalled on the threshold of the spectral hollow before them. The cavern itself seemed to glow with a reddish hue, and as Langdon took it all in, he could feel himself breathing as shallowly as possible.

The air down here was heavier than he’d imagined.

Langdon could see the crowd in the distance to their left. The concert was taking place deep in the underground space, halfway back against the far wall, its audience seated on an expanse of platforms. Several hundred spectators sat in concentric rings that had been arranged around the orchestra while a hundred more stood around the perimeter. Still others had taken up positions out on the near boardwalks, leaning on the sturdy railings and gazing down into the water as they listened to the music.

Langdon found himself scanning the sea of amorphous silhouettes, his eyes searching for Sienna. She was nowhere in sight. Instead he saw figures in tuxedos, gowns, bishts, burkas, and even tourists in shorts and sweatshirts. The cross section of humanity, gathered in the crimson light, looked to Langdon like celebrants in some kind of occult mass.

If Sienna’s down here, he realized, it will be nearly impossible to spot her.

At that moment a heavyset man moved past them, exiting up the stairs, coughing as he went. Brüder spun and watched him go, scrutinizing him carefully. Langdon felt a faint tickle in his own throat but told himself it was his imagination.

Brüder now took a tentative step forward on the boardwalk, eyeing their numerous options. The path before them looked like the entrance to the Minotaur’s labyrinth. The single boardwalk quickly forked into three, each of those branching off again, creating a suspended maze, hovering over the water, weaving in and out of the columns and snaking into the darkness.

I found myself within a forest dark, Langdon thought, recalling the ominous first canto of Dante’s masterwork, for the straightforward pathway had been lost.

Langdon peered over the walkway’s railing into the water. It was about four feet deep and surprisingly clear. The stone tile floor was visible, blanketed by a fine layer of silt.

Brüder took a quick look down, gave a noncommittal grunt, and then raised his eyes back to the room. “Do you see anything that looks like the area in Zobrist’s video?”

Everything, Langdon thought, surveying the steep, damp walls around them. He motioned to the most remote corner of the cavern, far off to the right, away from the congestion of the orchestral platform. “I’m guessing back there somewhere.”

Brüder nodded. “My instinct as well.”

The two of them hurried down the boardwalk, choosing the right-hand fork, which carried them away from the crowd, in the direction of the farthest reaches of the sunken palace.

As they walked, Langdon realized how easy it would be to hide overnight in this space, undetected. Zobrist could have done just that to make his video. Of course, if he had generously underwritten this week-long concert series, he also could have simply requested some private time in the cistern.

Not that it matters anymore.

Brüder was striding faster now, as if subconsciously keeping pace with the symphony’s tempo, which had increased into a cascading series of descending semitone suspensions.

Dante and Virgil’s descent into hell.

Langdon intently scanned the steep, mossy walls in the distance to their right, trying to match them up with what they had seen in the video. At each new fork in the boardwalk, they turned right, moving farther from the crowd, heading for the cavern’s most remote corner. Langdon looked back and was astounded by the distance they had covered.

They advanced at almost a jog now, passing a handful of meandering visitors, but by the time they entered the deepest parts of the cistern, the number of people had thinned to nothing.

Brüder and Langdon were alone.

“It all looks the same,” Brüder despaired. “Where do we start?”

Langdon shared his frustration. He remembered the video vividly, but nothing down here leaped out as a recognizable feature.

Langdon studied the softly lit informational signs that dotted the boardwalk as they moved ahead. One described the twenty-one-million-gallon capacity of the room. Another pointed out a nonmatching pillar that had been looted from a nearby structure during construction. And still another offered a diagram of an ancient carving now faded from view—the Crying Hen’s Eye symbol, which wept for all the slaves who died while building the cistern.

Strangely, it was a sign that bore a single word that now stopped Langdon dead in his tracks.

Brüder halted, too, turning. “What’s wrong?”

Langdon pointed.

On the sign, accompanied by a directional arrow, was the name of a fearsome Gorgon—an infamous female monster.


Brüder read the sign and shrugged. “So what?”

Langdon’s heart was pounding. He knew Medusa was not only the fearsome snake-haired spirit whose gaze could turn anyone who looked at her to stone, but was also a prominent member of the Greek pantheon of subterranean spirits … a specific category known as the chthonic monsters.

Follow deep into the sunken palace …

for here, in the darkness, the chthonic monster waits …

She’s pointing the way, Langdon realized, breaking into a run along the boardwalk. Brüder could barely keep up with him as Langdon zigzagged into the darkness, following the signs for Medusa. Finally, he reached a dead end at a small viewing platform near the base of the cistern’s rightmost wall.

There before him was an incredible sight.

Rising out of the water was a colossal carved marble block—the head of Medusa—her hair writhing with snakes. Making her presence here even more bizarre was the fact that her head had been placed on her neck upside down.

Inverted as the damned, Langdon realized, picturing Botticelli’s Map of Hell and the inverted sinners he had placed in the Malebolge.

Brüder arrived breathless beside Langdon at the railing, staring out at the upside-down Medusa with a look of bewilderment.

Langdon suspected that this carved head, which now served as a plinth supporting one of the columns, had probably been pillaged from elsewhere and used here as an inexpensive building supply. The reason for Medusa’s inverted position was no doubt the superstitious belief that the inversion would rob her of her evil powers. Even so, Langdon could not shake off the barrage of haunting thoughts that assailed him.

Dante’s Inferno. The finale. The center of the earth. Where gravity inverts itself. Where up becomes down.

His skin now prickling with foreboding, Langdon squinted through the reddish haze that surrounded the sculpted head. Most of Medusa’s serpent-infested hair was submerged underwater, but her eyes were above the surface, facing to the left, staring out across the lagoon.

Fearfully, Langdon leaned over the railing and turned his head, letting his gaze follow the statue’s out into the familiar empty corner of the sunken palace.

In an instant, he knew.

This was the spot.

Zobrist’s ground zero.


Agent Brüder lowered himself stealthily, sliding beneath the railing and dropping down into the chest-deep water. As the rush of cool liquid permeated his clothing, his muscles tensed against the chill. The floor of the cistern was slippery beneath his boots, but it felt solid. He stood a moment, taking stock, watching the concentric circles of water rippling away from his body like shock waves across the lagoon.

For a moment Brüder didn’t breathe. Move slowly, he told himself. Create no turbulence.

Above him on the boardwalk, Langdon stood at the railing, scanning the surrounding boardwalks.

“All set,” Langdon whispered. “Nobody sees you.”

Brüder turned and faced the huge upside-down head of Medusa, which was brightly lit by a red spotlight. The inverted monster looked even larger now that Brüder was down at her level.

“Follow Medusa’s gaze across the lagoon,” Langdon whispered. “Zobrist had a flair for symbolism and dramatics … I wouldn’t be surprised if he placed his creation directly in the lethal sight line of Medusa.”

Great minds think alike. Brüder felt grateful that the American professor had insisted on making the descent with him; Langdon’s expertise had guided them

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