"Daggit said the cult took Loo-ae away," Ru said, changing the subject.

"Our Cub destroyed it." Shaw explained that Ukiah had called Indigo to let her know he had figured out Loo-ae's location and arranged for the Pack to meet him. The Dog Warriors arrived to find the device full of bullets and Ukiah far out ahead of them.

"And the cult?" Atticus asked.

"No sign of them," Shaw said.

"How did he know we were walking into trouble?"

Shaw gave him a look that made Atticus realize the Dog Warrior was lying about something but wasn't about to betray Ukiah.

"We're about to hang our asses way out over the line to work with you. The Ontongard are working on a transmitter. Ukiah showed me Prime's memories. I know we have to stop them, and I'm committing to do whatever it takes, but I need to know everything. Tell me what happened."

Shaw assessed him with a long, hard stare. "The Gets caught up with the cult this morning. We found Ice's body with Loo-ae; he was within a few hours of transforming fully into a Get."

What Shaw didn't say—would probably never say to a law officer—was that Ukiah had killed Ice.

Atticus pushed through the flash of anger at his brother. He was jumping to conclusions in thinking it was a coldblooded murder. Given how he had first found Ukiah, self-defense was entirely possible. "We need to pool knowledge."

Something exploded in the warehouse, drawing their eyes.

"Not here." Shaw jerked his head in the opposite direction. "Let's find someplace quiet to plan."

***

They gathered under a highway overpass slated to be torn down as part of the Big Dig. Indigo arrived, flanked by her Pack guard. The Dog Warriors drifted into the shadows to stand watch. Indigo had once again wrapped herself in her arctic zone. She saw Atticus watching her, and said, "It's not like I haven't been through this a dozen times before," to which Ru nodded.

He and Ru had pried Kyle from Sumpter, distracting their supervisor with Hellena Gobeyn in her tight leather pants and camisole top. The alpha female promised that she wouldn't break any bones and all Sumpter's bruises would fade within two or three weeks.

The meeting was deceptively small. To the humans, it probably seemed that Rennie Shaw was the only addition to the combination of DEA and FBI forces, but Atticus could sense the rest of the Pack spread out around them, listening in.

"The cult had learned that the Ontongard set their nests up in a hexagonal pattern." Kyle spread out a map on the Explorer's tailgate, showing that the Waltham site formed one corner. "Ukiah said that the cult also had an algorithm to figure out where they would move to if one nest was destroyed; basically this pattern would swivel on the nest opposite of the nest destroyed. Since the Pack attacked the Watertown nest, it would have made sense for them to destroy the Waltham nest, and these, but they should have left this one."

"So they've cut the thread."

"Stone cold."

"Maybe," Zheng said. "I've noticed one thing about these nests: They're all at companies that have to do with large construction projects."

That niggled something in the back of Atticus's mind. "Well, if they've built this transmitter someplace, they would need construction companies. This thing is supposed to be huge."

"Much bigger than a bread box," Rennie agreed.

How do you hide something so big—especially with it just hours from being finished?

Atticus gasped and flipped the map. "The Big Dig. It's the largest construction project in the country, perhaps the world, at the moment. If the Ontongard infiltrated the right companies, they could just add the transmitter to the design specs."

"Okay." Kyle took out a highlighter and marked up the map until the downtown area of Boston bled pink. "This is an old map we picked up from the D.C. office. These highways here are what got buried."

Rennie was already shaking his head. "We've been all over this area. Hell, your team has been sleeping almost on top of it. The Ontongard aren't down in these tunnels, and I can't see them leaving the thing unguarded. It's not Hex's way to trust humans."

Atticus studied the highlighting. There had been plenty of Ontongard at the warehouse just hours ago, and there had been Ice, halfway between the two races. "Where did Ukiah find Loo-ae?"

"Here." Rennie pointed out a point just on the water's edge. "Ventilation Building Six."

Kyle typed in a search. "VB-Six pulls exhaust out of the Ted Williams Tunnel." He paused to draw a line across the harbor. "And feeds in fresh air."

"Loo-ae was duct-taped to one of the intake fans," Rennie reported.

"Intake?" Atticus said. "The cult wanted the poisons down inthe tunnel?"

"We haven't been out on the water," Rennie murmured. "If Hex somehow added to the tunnel there, under the bay, his Gets would be well hidden from us."

"I saw a documentary on how they built these tunnels," Indigo said. "They actually built large tubes down in Baltimore, floated them up the harbor, and sank them to make these tunnels. It seemed like an insane way of doing it to me."

"The transmitter's particle tubes need precision you're not going to get tunneling through rock." Rennie tapped the map at VB6. "But there were no Ontongard with Ice at this building."

"If it's number six," Atticus said, "there's at least five others."

"One on each end of the tunnel." Kyle spoke without looking up, searching through files on his laptop.

"So what if, knowing that he couldn't get Loo-ae into this building"—Atticus pointed to the far end of the Ted Williams Tunnel—"he put it in this one and counted on the poison being sucked through?"

Rennie went still, but Atticus could feel him expanding outward, becoming all of the Pack, tapping their memories. "That peninsula is all man-made land in the last few decades. We forget it's there. They made it to build Logan Airport. We've always had little need for planes. Wolves are meant to run on the ground. None of us have been out to that part of the city."

"So they've hidden the control center someplace out here." Atticus ran his finger along the runnel and up to the man-made land. "We need to find it and destroy it."

"In a nutshell, yes," Shaw said. "One very big and hard nutshell—and the clock is ticking."

Kyle made a noise of frustration. "There's a ton of info on the Big Dig, but for as-built drawings and actual information on access doors and security protocols and locations of cameras . . . we're talking hours for me to get anywhere."

"Then let's go to the source." Ru grinned. "DEA with FBI backup? We can glide into anything tonight."

***

Operations Control Center, nicknamed OCC, was in South Boston. Flashing badges, his team and Indigo bullied their way into the building, sans any of the Pack—but only after being sure it was innocent of Ontongard. The bulk of the building was dedicated to keeping watch over the intricate roadway. In one huge room, employees sat bathed in the glow from over a hundred monitors, dominated by blue images of light gleaming off ceramic tiles lining miles of tunnels. It felt like walking into a missile command center. It was running on a skeleton shift of three employees.

"I don't understand," the nominal supervisor stuttered as Kyle made nice with the two techno geeks. "What exactly is the nature of this alleged emergency?"