“You can say that, but I know it’s not true. Why would the Jihad tell me that the shinkansen would run again? Why would it tell me to save Sonja? Why would it remember the promise you made to me? Why would it do any of these things if it wasn’t you?” Petrovitch stared hard at Oshicora’s faint smile. “So you have heard of the Jihad.”

“I dreamed of it, of a world where there was a revolution in technology: a new machine age.” He raised his eyebrows. “I had never expected to dream.”

“What else?”

“I dreamed of Oshicora’s daughter. And I dreamed of you. And a city, not like this one,” and he looked around him at the dark wood and burnished chrome, “but one made of steel and concrete, alive with movement and noise.”

Petrovitch understood at last. “Okay. What if I were to say to you that it’s your dreams that are leaking out into the real world? Your subconscious is running out of control, trying to create Tokyo from the ruins of the London Metrozone. Did you ever want to drive a train when you were younger?”

“Of course. I still do.”

“That little fantasy nearly killed me. You drove an express train at full speed into St. Pancras station while I was walking along the track. How about Sonja? How do you feel about her?”

“Protective. She is my creator’s child.”

“It’s more than that. You think she’s your daughter. Not up here,” Petrovitch said, tapping his head. He moved his hand to cover his heart. “but here. You told me to save her. I’ve rescued her from Sorenson, lost her to Chain, only to get her back from Hijo. And if I could, I’d show you what’s happening outside the tower. How it’s surrounded by water, choked with bodies and thick with rats feeding on the corpses. How there are fires everywhere, vast slices taken out of buildings as your monsters tear up the city. Oshicora-san, you might be sane in here, but out there, the New Machine Jihad is mad.”

“I appreciate the efforts you have made, Petrovitch-san. But I still do not see how this can possibly be.”

There was an envelope on the table in front of Petrovitch. It had his name on it in Cyrillic. It hadn’t been there a moment before.

“Is that for me?”

“Yes. I suggest you open it.”

Petrovitch picked up the envelope and slid his finger under the heavy paper flap. It tore open, and he eased the card out from inside. It was gold-edged, embossed, and had a big red octagon printed beneath bold words. “Yeah. A message from the monitoring software. I’ve gone into ventricular tachycardia.”

“Do you wish to leave and seek medical attention?”

He tapped the card on the table. “There’s nowhere to go. Any hospital that hasn’t been burned down to the ground by now is locked up tighter than the Lubyanka.”

“I have been trying,” said Oshicora, “to work out why you believe you are telling me the truth despite the impossibility of your claims. Now you seem to be prepared to die for what might well be a delusion. Normally, I would judge you to be mentally ill, but I know you. Do you think you have time to convince me otherwise?”

“You know, it’s not meant to be this hard.” Petrovitch poured himself more sake, and proffered the bottle to Oshicora, who politely declined. “But then again, what do I know? I’m lying in a dentist’s chair, in the only building with power in the entire Metrozone, with experimental cybernetics jacked into my brain, talking to a copy of a man who’s ignorant of the fact that he’s been dreaming the destruction of an entire city, while my heart finally fails.” He picked up his drink and threw it back in a single gulp.

“But would you have missed it?”

“Not if I’d have lived to be a hundred. Let me show you how we do things in Russia.” He tossed the cup in his hand, then threw the cup against the bar. It shattered, and shards of china spun away. He got to his feet and slid the emergency card inside his breast pocket.

“Take me,” he said, “to your firewall.”

The scene changed again, instantly and without any sense of motion. They were in an electronics shop, deep in the sideways of Akiba. They were surrounded by densely-packed shelves of components; plastic bins brimming with chips, fans, heat pumps, connectors, cables and cards. At the far end of the aisle, a glass case displayed the very latest hardware.

“Will this do?” asked Oshicora.

“Yeah.” Petrovitch squeezed past and picked up a slim console with a holographic screen and virtual keyboard. He powered it up and watched the commands scroll past in the air. “Gesture recognition too. So, what’s on the other side of the firewall: the Oshicora intranet or a web-accessed network node?”

“VirtualJapan is within the Oshicora system, as I understand it, which has its own security.” Oshicora peered over Petrovitch’s shoulder. “Do you feel any different yet?”

“Not dead yet, if that’s what you mean.” His fingers typed rapidly. “Log me on in God mode. Let’s see if we can change some settings.”

Numbers flowed across the screen, and Petrovitch scanned them as they flew by.

“Prime number encryption keys,” said Oshicora. “I had to allow—my creator had to allow—for the presence of very many otaku who would attempt to hack the fabric of this reality for their own perverse obsessions.”

“No animé cat-girls? Though I do see your point.” He made a gesture, dragged and pointed at an icon, which bloomed into life. “Okay, so here’s the firewall controls, and I can’t move them without another password. Any ideas?”

“This is kinshino. Forbidden.”

“Oshicora-san, can I remind you that not only are you dead, but you’re also a quantum computer? You could crack this in a second if you wanted to, and your subconscious mind has already done so. It’s shoveling out a stream of commands and receiving vast oceans of data in return. You just don’t know it.” He tapped his finger in the air. “See?”

A graph appeared, measuring data transfer over time. He expanded the axis to read in days rather than seconds, and showed Oshicora the past week.

“You died on Wednesday night or early Thursday morning, and there’s a rise in activity. Information is starting to seep out. This spike here, that’s when you helped Sorenson and Sonja escape Hijo, then you killed all your employees, and it just climbs from there. More and more until you’re running in the terabyte range. For something which is forbidden, it’s happening an awful lot. Take the firewall down for five minutes, have a look around outside. Slap it back up and leave me to die if I’m not telling the truth.”

“You are very sure of yourself, Petrovitch-san. Very well.” Oshicora touched the screen and filled in the missing characters. “You have your access.”

The screen filled with a dense mat of icons, all overlapping each other in unreadable density. Petrovitch ran his finger over them, letting each one expand so he could sense their purpose before discarding them and moving on.

“Climate control, power consumption, physical access, data access. Hang on, physical access. When was I able to read Japanese?”

“When I altered your configuration. A harmless modification.”

“Thanks. Access, security, closed-circuit cameras.” A map of the building and the surrounding area unfolded. “Garden. Garden one, garden two. There.”

Petrovitch dabbed the corners of the screen and pulled the image wide. Hijo lay twisted on the ground. He found another camera. Chain sat hunched over on the temple steps and Madeleine paced restlessly in front, glancing inside the temple on every pass. He picked floors at random, each one showing empty corridors, empty cubicles, and moved down the building until he reached the ground floor.

He showed Oshicora the bodies and the rats from several angles, then moved outside, using the zoom to show the building isolated in its illuminated glory. He panned the camera, and revealed the hell it was set in. The skyline trembled and a section of box-girder passed in front.