And then he saw it—the narrow river of quicksilver was pouring out of a dark opening in the rocks.

“I see the entrance to a cave,” he said.

“I’ll take your word for it. I still can’t make out anything except this damn green fog.”

It dawned on him that she had been following him blindly for the past several minutes, trusting him to navigate the mist-clouded darkness. He was pretty sure the majority of people who knew about his shattered talent—and understood exactly what that meant—would have been terrified by now.

“Almost there,” he said.

He steered her through the cave entrance. To his relief, the interior of the cavern was big and mercifully clear of the mist. It was obvious at once that they had entered a human-engineered tunnel, not a natural rock cave. The walls, ceiling and floor of the space were lined with what looked like black glass. The material radiated enough energy to illuminate the room in an icy blue glow.

“Can you see now?” North asked.

Sierra looked around, took a deep breath and released her grip on his belt. “No problem. The light in here is visible to me. There’s some heat as well. We won’t be cold tonight. Can you still make out the quicksilver river?”

“Yes. The currents are coming from that side tunnel.” He indicated the entrance to a narrow passageway. “We should be able to use the energy river to navigate back to the road in the morning.”

“Olivia said the first rule of survival in the Fogg Lake tunnel system is to find the strongest current and follow it in. Then use the same current to find your way back out.”

“Got news for you—that rule applies to navigating any sort of paranormal energy,” North said. “There’s just one problem with the concept.”

“What?”

“You may not like what you find when you reach the source of the energy stream you’re following.”

Sierra looked around. “I think we’ll be okay in here tonight, but it’s going to be a long hike into Fogg Lake tomorrow.”

“When we fail to show up tonight, the Foundation team in Fogg Lake will assume we got stranded in the fog. They’ll come looking for us in the morning. When they see the burned-out wreck of your SUV on the side of the road they’ll know where to start the search.”

“Assuming they realize we didn’t die in that explosion,” Sierra said.

“No bodies, remember? Trust me, they’ll look for us. We’ll go back to the road first thing in the morning. I’ll bet we run straight into the search party.”

“Or the Puppets,” Sierra said.

“Right now those four are probably telling themselves that we’ll be dead or hopelessly lost by morning. They aren’t our main problem, anyway.”

“Could have fooled me. In case you didn’t notice they just tried to kill us and they destroyed my car,” Sierra said.

“I know, but it’s the man they’re working for we have to worry about.”