He spun the image around and spoke through his q-link to the harvester team he was supporting. “Alpha, be advised; Davis is speaking with someone.”

A voice came over the q-link, the metadata for the transmission automatically identifying the speaker—it was Eta-Kappa. “TOC, there’s no one else in the room.”

Mu zoomed in to make Davis grow life-size in front of him. There was still perfect clarity. He spun the image around and saw that she was definitely talking to someone. He brought up the volume.

“Where are you planning on going?”

“Look, now is not the time to have this conversation. Just do what I asked.”

Mu shook his head and spoke into his q-link. “Negative, Alpha, I’m telling you she’s already talking with him.” An alert appeared on his screen. “AI just gave a positive match on Grady’s voice. The target subject is in contact.”

“TOC, we’re scanning every radio frequency. There are a couple of cell phones in the room, a Wi-Fi a few doors down, but no transmissions, encrypted or otherwise.”

Mu flipped the image to infrared and saw only Davis’s heat source. Then he flipped it to ultraviolet. No one hiding with diffraction gear. “I don’t see any invisible objects, but I’m telling you, he’s talking with her. He’s right there. He’s got some advanced tech we don’t know about.”

Mu turned to another holographic display showing a 3D real-time video map of the campus outside the Mathematics Building in miniature, with the locations of all the nearby BTC agents, marked with blue dots, as well as civilians moving about. Eta was tagged in an office on the top floor of the Mathematics Building, along with half a dozen other operators. There were no gaps in the perimeter.

“I’m telling you, he’s there. Jam all wireless communications in a quarter-mile radius, and cordon off the building. Teams Alpha, Charlie, and Echo, move in. Clear every room and maintain a perimeter. No one goes in or out. Nox everyone you come in contact with, and secure both Davis and Grady when you find them. Do you copy?”

“Echo copies, TOC.”

“Alpha copies.”

“Charlie copies.”

“Execute, execute, execute.”

As the blue dots converged on the library, Mu looked to the surveillance hologram. Agent Davis sprang up from the desk and ran to the stairwell door. “Be advised, Davis is leaving the library at speed”—he flipped to the building’s own (much poorer quality) security cameras—“moving down stairwell two.”

“Copy that, TOC.”

 • • •

As Davis sprinted down the uneven stone steps, she winced against the piercing emergency door alarms. She kept going down—two floors into the basement. A glance up told her there were cameras, but she ignored them.

She couldn’t hear a thing above the wailing of the fire alarms. She wondered what the Twins would have to say about this. Bad career move. She certainly knew Tracy wouldn’t approve.

Good-bye, Denver.

Through the door, Davis ducked right and started running down a long utility corridor, its floor painted red. Up ahead she couldn’t miss her objective: a truly massive metal door with a “No Unauthorized Access” sign. The thing looked positively Victorian, with massive hinges and rivets.

She sprinted toward it and yanked on the thick metal handle. The door swung open with a groan, and in her rush to enter she almost flung herself down a flight of crude stone steps leading into yet another subbasement. In the nick of time she grabbed onto an iron railing and caught herself.

“Careful.”

She looked up to see Jon Grady standing off to the side, a small rucksack on his back.

“Yeah, thanks for the warning.”

He pulled the door closed, then rammed a dead bolt home with a loud click-clack. “Follow me. We need to keep moving.”

Davis stayed on his heels down steps worn from the passage of many feet and years. At the bottom was a winding corridor lined with more steam and water pipes and electrical conduits, and also cluttered with moving dollies, sawhorses, cardboard boxes for computer equipment and fiberglass insulation, piles of lumber, tarpaulins, electrical cabling—there was stuff everywhere. Twin grooves in the center of the stone floor led off down the corridor, which was lit by bare fluorescent fixtures at intervals.

“What is this place?”

“Steam tunnels. Old. Really old. Those slots in the floor were for coal carts.”

Davis stayed close to Grady. He seemed to know where he was going, and as they rounded a corner, she couldn’t believe how far the next corridor stretched into the distance. “These connect the buildings.”

“Most of them, yeah.”

“How did you know about this?”

“To be honest, I can’t remember. My memory’s blank in spots. But I do seem to know.”

“Alcot. He’s why you came here. You spent time here—but you weren’t a student?”

He shook his head. “I’m not good with structure. I prefer to do things unofficially. But he helped me. Now I want to help him.”

“You’re saying Doctor Alcot is alive, too?”

“I’m hoping so.”

 • • •

Two Morrison clones in hockey jerseys and jeans raced through the basement corridors, delta-wave guns at the ready, as the fire alarms wailed. They rounded a corner to see a dozen other Morrisons like themselves, but in various outfits and hairstyles—beards, crew cuts, and ponytails—converging on the same place, in front of the huge steel door.

The fire alarms finally stopped.

They all lowered their weapons as one of them, wearing ratty army surplus pants and a T-shirt, kicked the massive steel door in their path. “Fuck!”

“The rest of the building’s clear.”

The angry Morrison was still kicking the door. “Fuck, fuck, fuck!”

“Eta, we shouldn’t be bunching up like this. The old man would have our asses if he knew how many of us were gathered in public.”

“Fuck off, Rho. They went through this goddamned door.”

Rho stowed his weapon and brought up a hologram. “It’s not even on the tactical plan.”

“Goddamned right it’s not. TOC fucked up again.”

Rho spoke over his q-link. “TOC, we’ve got a steel door blocking pursuit of the target subjects. This door is not on the tactical plan.”

“Copy that, Rho-Sigma. Will advise, please stand by.”

“Advise, my ass. I’m gonna delete the AI asshole that did this to us, I swear to God.”

“We’ve gotta bring this door down.”

Eta turned on him. “Yeah? Tech level four, nonlethal, and you’re gonna bring down a steel gate?” He kicked the door again for good measure. It was like kicking the side of a locomotive.

A voice came over their radios. “TOC to Team Charlie, Team Echo. Redeploy to indicated coordinates.”

Eta ignored the call as the others started to move. Instead, he was rummaging through his cargo pockets.

Rho called back to him. “Eta!”

“I’ll be damned if I’m going back to Dad empty-handed.” He produced a small black cube wrapped in a translucent material.

The others had stopped and were looking on, intrigued.

Rho approached. “Is that what I think it is?”

“Better to beg for forgiveness than ask permission . . .”

“Where the hell did you get that?”

“Never mind where I got it.”

TOC’s voice came over the radio again. “TOC to Team Charlie—”

Eta silenced his q-link..

“You are way off reservation, kemosabe.”

“Stop being such a pussy.” He rubbed the surface of the steel door clean of debris and then pressed the small black cube onto it. The device stuck in place. “We are getting through this door, and we are getting Grady.”

“That’s illicit nanotech. We’re not authorized to—”

“Terminal kinematic mechanosynthesis. I promise it won’t destroy the world.” He shoved Rho back and stared him down. “This mission is not failing. Do you read me?”