Maya stood on the platform feeling very conspicuous as commuters hurried to board the shuttle. When the train clattered out of the station, Hollis approached her and spoke in a quiet voice.

“You still want to get on the train going to Ten Mile River?”

“We’ll evaluate the situation when we reach the platform. Naz says there aren’t any cameras there.”

Hollis nodded. “The Tabula scanners probably detected us when we left the loft and walked through Chinatown. Then somebody figured out we were using the old subway station and hacked into the transit computer.”

“There’s another explanation.” Maya glanced over at Naz.

“Yeah, I thought about that, too. But I watched his face in the subway car. He really looked scared.”

“Stay close to him, Hollis. If he starts running, stop him.”

A new shuttle train arrived, took on a new crowd of passengers, and then rattled west toward Eighth Avenue. It felt like they would be standing there forever. Finally the transit policeman got a call on his radio and hurried away. Naz ran over to the Knickerbocker door and fumbled through the keys on his ring. When the lock clicked, he smiled and pulled the door open.

“Special subway tour goes this way,” he announced, and a few commuters watched the group disappear through the doorway. When Naz shut the door, they stood close together in a short, dark passageway. He led them past a manhole cover and then down four concrete steps to the subway tunnel.

Everyone stood between one set of tracks as Naz pointed at a third rail filled with electric current. “Be careful with the wooden shield that covers that,” he told them. “If it breaks and your body hits the rail, you’re dead meat.”

The tunnel was black with soot and smelled like sewage. Water trickled down the drainage channel; it oozed through the concrete wall and made the surface glisten like oil. The City Hall station had been dusty, but fairly clean; the tunnel to Times Square was littered with trash. Rats were everywhere-dark gray ones nearly a foot long. This was their world, and they weren’t afraid of humans. When intruders appeared, the rats continued to rummage through the garbage, squeaking at one another or scurrying up the walls.

“They’re not dangerous,” Naz said. “Just watch where you’re going. If you fall down, they crawl all over you.”

Hollis stayed close to their guide. “Where’s this doorway you were talking about?”

“It’s right around here. Swear to God. Start looking for a yellow light.”

They heard a low, rumbling sound, like distant thunder, and saw the headlights of the approaching shuttle. “Next track! Next track!” Naz shouted. Without waiting for the others, he leaped over the third rail to the adjacent track.

Everyone but Sophia Briggs followed Naz. The old woman looked exhausted and slightly confused. As the lights of the shuttle got closer, she took a risk and stepped directly on the wooden cover of the third rail. It held her weight. A moment later, she passed through the gloom and joined the others.

Naz darted up the track and then came back looking excited. “Okay. I think I found the door to the stairway. Just follow me and-”

The shuttle train on the next track absorbed the rest of his words. Maya saw quick flashes of different passengers framed within the windows-an old man with a knit cap, a young woman with braids-and then the train was gone. A candy wrapper flew up in the air and drifted downward like a dead leaf.

They kept walking to a juncture that led off in three different directions. Naz took the track on the right and then led them to an open doorway illuminated by a single lightbulb. He climbed up three metal steps and entered a maintenance tunnel, followed by Alice and Vicki. Hollis reached the top of the steps and shook his head. “We need to slow down. Sophia is getting tired.”

“Find a safe place and wait for us,” Maya said. “Gabriel and I will bring her along.”

Maya knew that her father would have betrayed the rest of the group to save the Traveler, but she couldn’t fall back on this strategy. Gabriel wasn’t going to leave anyone behind in the tunnels-least of all the woman who had been his Pathfinder. She looked down the tunnel and saw that Gabriel had taken Sophia’s knapsack and placed it on his own shoulders. When he offered his arm to Sophia, the old lady shook her head vigorously, as if to say, I don’t need anyone’s help. Sophia took a few steps forward and then a red laser beam cut through the gloom. “Get down!” Maya shouted. “Get-”

There was a sharp cracking sound and a bullet hit Sophia in the back. The Pathfinder fell forward, tried to get up, and then collapsed. Maya drew her revolver and fired down the tunnel as Gabriel scooped up Sophia and ran toward the steps. Maya followed him, pausing in the open doorway to fire again. The laser beam vanished as four dark shapes retreated into the shadows.

Maya broke open the revolver and used the ejector rod to push out the empty cases. She was reloading as she entered a maintenance tunnel with brick walls, and found Gabriel on his knees embracing Sophia’s limp body. His brown leather jacket was covered with blood.

“Is she breathing?”

“She’s dead,” Gabriel told her. “I held her and she was dying and I felt the Light leave her body.”

“Gabriel…”

“I felt her die,” Gabriel said again. “It was like water flowing between your fingers. I couldn’t hold it back…couldn’t stop it…” He shivered violently.

“The Tabula are very close,” Maya said. “We can’t stay here. You’re going to have to leave her.”

She touched Gabriel’s shoulder and watched as he gently lowered Sophia’s body onto the floor. A few seconds later, they hurried down the tunnel to a stairway landing where the others were waiting. Vicki gasped when she saw the blood on Gabriel’s jacket, and Alice looked as if she were about to run away. The child’s head moved back and forth. Maya sensed what Alice was thinking: Who will protect me now?

“What happened?” Vicki asked. “Where’s Sophia?”

“The Tabula killed her. They’re right behind us.”

Vicki put her hands to her mouth and Naz looked like he was about to run away. “That’s all,” he said. “I quit. I’m not part of this.”

“You don’t have a choice. As far as the Tabula are concerned, you’re just another target. Right now we’re directly under the train station. You’ve got to get us out of this area and back on the street.” She turned to the others. “This is going to be difficult, but we need to stay together. If we get separated, meet at Purest Children at seven o’clock tomorrow morning.”

Looking frightened, Naz led the group downstairs to a tunnel with electrical conduit on the ceiling. It felt as if the weight of the terminal were pushing them deeper into the earth. Another staircase appeared-a very narrow one-and Naz followed it. The air in this new tunnel was warm and moist. Two white pipes, each two feet in diameter, were fastened to the walls.

“Steam pipes,” Naz muttered. “Don’t touch.”

Following the pipes, they passed through a pair of steel safety doors and entered a maintenance room with a thirty-foot ceiling. Four large steam pipes from different parts of the underground were joined together in the room; the pressure was monitored with stainless-steel gauges and diverted with regulator valves. Stagnant water dribbled out of a crack in the ceiling and dripped downward. The room had the fetid, moldy smell of a hothouse for tropical plants.

Maya shut the safety door behind her and looked around. Her father would have called this a “box canyon”-a place with one way in and no way out. “Now what?” she asked.

“I don’t know,” Naz said. “I’m just trying to get away.”

“That’s not true,” Maya said. “You led us here.”

She drew the push knife and held the T-shaped handle in her fist. Before Naz could react, she grabbed his jacket and slammed him against the wall. Maya held the tip of her knife against the slight indentation just above Naz’s breastbone.