She nodded blankly.

“And I’m sorry to have dragged you into this. I know your situation at the hospital is unusual, and if there’s an investigation …” He trailed off.

“It’s okay,” she said. “I’m no stranger to moving around.”

Langdon sensed in Sienna’s distant eyes that everything had changed for her this morning. Langdon’s own life was in chaos at the moment, and yet he felt his heart going out to this woman.

She saved my life … and I’ve ruined hers.

They sat in silence for a full minute, the air between them growing heavy, as if they both wanted to speak, and yet had nothing to say. They were strangers, after all, on a brief and bizarre journey that had just reached a fork in the road, each of them now needing to find separate paths.

“Sienna,” Langdon finally said, “when I sort this out with the consulate, if there’s anything I can do to help you … please.”

“Thanks,” she whispered, and turned her eyes sadly toward the window.

As the minutes ticked past, Sienna Brooks gazed absently out the kitchen window and wondered where the day would lead her. Wherever it was, she had no doubt that by day’s end, her world would look a lot different.

She knew it was probably just the adrenaline, but she found herself strangely attracted to the American professor. In addition to his being handsome, he seemed to possess a sincerely good heart. In some distant, alternate life, Robert Langdon might even be someone she could be with.

He would never want me, she thought. I’m damaged.

As she choked back the emotion, something outside the window caught her eye. She bolted upright, pressing her face to the glass and staring down into the street. “Robert, look!”

Langdon peered down into the street at the sleek black BMW motorcycle that had just rumbled to a stop in front of Pensione la Fiorentina. The driver was lean and strong, wearing a black leather suit and helmet. As the driver gracefully swung off the bike and removed a polished black helmet, Sienna could hear Langdon stop breathing.

The woman’s spiked hair was unmistakable.

She produced a familiar handgun, checked the silencer, and slid it back inside her jacket pocket. Then, moving with lethal grace, she slipped inside the hotel.

“Robert,” Sienna whispered, her voice taut with fear. “The U.S. government just sent someone to kill you.”

Robert Langdon felt a swell of panic as he stood at the apartment window, eyes riveted on the hotel across the street. The spike-haired woman had just entered, but Langdon could not fathom how she had gotten the address.

Adrenaline coursed through his system, disjointing his thought process once again. “My own government sent someone to kill me?”

Sienna looked equally astounded. “Robert, that means the original attempt on your life at the hospital also was sanctioned by your government.” She got up and double-checked the lock on the apartment door. “If the U.S. Consulate has permission to kill you …” She didn’t finish the thought, but she didn’t have to. The implications were terrifying.

What the hell do they think I did? Why is my own government hunting me?!

Once again, Langdon heard the two words he had apparently been mumbling when he staggered into the hospital.

Very sorry … very sorry.

“You’re not safe here,” Sienna said. “We’re not safe here.” She motioned across the street. “That woman saw us flee the hospital together, and I’m betting your government and the police are already trying to track me down. My apartment is a sublet in someone else’s name, but they’ll find me eventually.” She turned her attention to the biotube on the table. “You need to open that, right now.”

Langdon eyed the titanium device, seeing only the biohazard symbol.

“Whatever’s inside that tube,” Sienna said, “probably has an ID code, an agency sticker, a phone number, something. You need information. I need information! Your government killed my friend!”

The pain in Sienna’s voice shook Langdon from his thoughts, and he nodded, knowing she was correct. “Yes, I’m … very sorry.” Langdon cringed, hearing those words again. He turned to the canister on the table, wondering what answers might be hidden inside. “It could be incredibly dangerous to open this.”

Sienna thought for a moment. “Whatever’s inside will be exceptionally well contained, probably in a shatterproof Plexiglas test tube. This biotube is just an outer shell to provide additional security during transport.”

Langdon looked out the window at the black motorcycle parked in front of the hotel. The woman had not yet come out, but she would soon figure out that Langdon was not there. He wondered what her next move would be … and how long it would take before she was pounding on the apartment door.

Langdon made up his mind. He lifted the titanium tube and reluctantly placed his thumb on the biometric pad. After a moment the canister pinged and then clicked loudly.

Before the tube could lock itself again, Langdon twisted the two halves against each other in opposite directions. After a quarter turn, the canister pinged a second time, and Langdon knew he was committed.

Langdon’s hands felt sweaty as he continued unscrewing the tube. The two halves turned smoothly on perfectly machined threads. He kept twisting, feeling as if he were about to open a precious Russian nesting doll, except that he had no idea what might fall out.

After five turns, the two halves released. With a deep breath, Langdon gently pulled them apart. The gap between the halves widened, and a foam-rubber interior slid out. Langdon laid it on the table. The protective padding vaguely resembled an elongated Nerf football.

Here goes nothing.

Langdon gently folded back the top of the protective foam, finally revealing the object nestled inside.

Sienna stared down at the contents and cocked her head, looking puzzled. “Definitely not what I expected.”

Langdon had anticipated some kind of futuristic-looking vial, but the content of the biotube was anything but modern. The ornately carved object appeared to be made of ivory and was approximately the size of a roll of Life Savers.

“It looks old,” Sienna whispered. “Some kind of …”

“Cylinder seal,” Langdon told her, finally permitting himself to exhale.

Invented by the Sumerians in 3500 B.C., cylinder seals were the precursors to the intaglio form of printmaking. Carved with decorative images, a seal contained a hollow shaft, through which an axle pin was inserted so the carved drum could be rolled like a modern paint roller across wet clay or terra-cotta to “imprint” a recurring band of symbols, images, or text.

This particular seal, Langdon guessed, was undoubtedly quite rare and valuable, and yet he still couldn’t imagine why it would be locked in a titanium canister like some kind of bioweapon.

As Langdon delicately turned the seal in his fingers, he realized that this one bore an especially gruesome carving — a three-headed, horned Satan who was in the process of eating three different men at once, one man in each of his three mouths.

Pleasant.

Langdon’s eyes moved to seven letters carved beneath the devil. The ornate calligraphy was written in mirror image, as was all text on imprinting rollers, but Langdon had no trouble reading the letters — SALIGIA.

Sienna squinted at the text, reading it aloud. “Saligia?”

Langdon nodded, feeling a chill to hear the word spoken aloud. “It’s a Latin mnemonic invented by the Vatican in the Middle Ages to remind Christians of the Seven Deadly Sins. Saligia is an acronym for: superbia, avaritia, luxuria, invidia, gula, ira, and acedia.”

Sienna frowned. “Pride, greed, lust, envy, gluttony, wrath, and sloth.”