I hesitated, and then offered her my hand. “It was nice knowing you, Rebecca,” I said.

“The same, Shaun. Believe me, the same.” She laced her fingers into mine and smiled wistfully. “Maybe when we get out of this alive, you and me can go for coffee or something.”

“Sure,” I said. She didn’t let go of my hand, and I didn’t pull away. Leaving our fingers tangled together like computer cables, I reached for the second door and pulled it open. An amber light clicked on across from us. Becks and I exchanged one final look before stepping through the doorway, into the relative darkness on the other side.

e door swung shut as soon as we were through, hydraulics engaging with a loud hiss that was almost reassuring. It meant all systems were go; even if those systems got us dissolved, they’d be doing so while fully operational. Another amber light clicked on to the left of the first one, and another, and another, until a line of tiny glittering beacons led the way deeper into the dark.

There was no other way to go, and Kelly’s instructions said to follow the light. We’d trusted her this far. The worst that trusting her the rest of the way could get us was dead. “Come on,” I said. We started in the direction indicated by the lights, moving as fast as we dared.

Distances always seem longer in the dark. The greater the darkness, the longer the distance. The amber lights were meant to guide us, not show us where we were going, and even my flashlight wasn’t enough to beat back the shadows. We probably traveled no more than a few hundred yards, but it felt like ten or twelve times that. Our breath was impossibly loud in the confines of the tunnel, and my toes kept catching on the floor, which wasn’t completely level. After the third time I almost tripped, I realized we were running across the floor of an enormous shower, complete with drains every ten feet. They’d be essential if the CDC ever needed to sluice the place down—say, after melting a few unwanted guests. I sped up, pulling Becks along with me. She didn’t argue. She was smart enough to want out of there as badly as I did.

The amber lights winked out about thirty seconds after we passed them, winking on ahead of us at the same rate. After the second time I looked back into the encroaching darkness, I forced myself to stop looking. It wasn’t doing a damn bit of good, and it was doing damage to my nerves that I really couldn’t afford.

I’m here, said George.

I squeezed Becks’s hand and kept going.

The amber lights led us around a corner and into a narrower hallway with lights lining the walls on either side. They were still small, but they were plentiful enough to show the outline of Becks’s face and shoulders. Being able to see her walking beside me lowered my stress levels like nothing else. I saw her head turn toward me, and I felt her fingers relax around mine as the same wave of relaxation washed over her. Maybe it was going to be okay.