I heard Golan’s flesh singe like a cold steak on a hot grill. He howled and rolled off me, his thin hair going up in flame, and then his hands were around Emma’s throat, as though he didn’t mind burning as long as he could choke the life out of her. I jumped to my feet, held the gun in both hands, and pointed it.

I had, just for a moment, a clear shot. I tried to empty my mind and focus on steadying my arm, creating an imaginary line that extended from my shoulder through the sight to my target—a man’s head. No, not a man, but a corruption of one. A thing. A force that had arranged the murder of my grandfather and exploded all that I’d humbly called a life, poorly lived though it may have been, and carried me here to this place and this moment, in much the way less corrupt and violent forces had done my living and deciding for me since I was old enough to decide anything. Relax your hands, breathe in, hold it. But now I had a chance to force back, a slim nothing of a chance that I could already feel slipping away.

Now squeeze.

The pistol bucked in my hands and its report sounded like the earth breaking open, so tremendous and sudden that I shut my eyes. When I opened them again, everything seemed strangely frozen. Though Golan stood behind Emma with her arms locked in a hold, wrestling her toward the railing, it was as if they’d been cast in bronze. Had the ymbrynes turned human again and worked their magic on us? But then everything came unstuck and Emma wrenched her arms away and Golan began to totter backward, and he stumbled and sat heavily on the rail.

Gaping at me in surprise, he opened his mouth to speak but found he could not. He clapped his hands over the penny-sized hole I’d made in his throat, blood lacing through his fingers and running down his arms, and then the strength went out of him and he fell back, and he was gone.

The moment Golan disappeared from view, he was forgotten. Emma pointed out to sea and shouted, “There, there!” Following her finger and squinting into the distance I could barely pick out the pulse of a red LED bobbing on the waves. Then we were scrambling to the hatch and sprinting down and down the endless seesawing staircase, hopeless that we could reach the cage before it sank but hysterical to try to anyway.

We tore outside to find Millard wearing a tourniquet and Bronwyn by his side. He shouted something I didn’t quite hear, but it was enough to assure me he was alive. I grabbed Emma’s shoulder and said, “The boat!” pointing to where the stolen canoe had been lashed to a rock, but it was too far away, on the wrong side of the lighthouse, and there was no time. Emma pulled me instead toward the open sea, and, running, we dashed ourselves into it.

I hardly felt the cold. All I could think about was reaching the cage before it disappeared beneath the waves. We tore at the water and sputtered and choked as black swells slapped our faces. It was difficult to tell how far away the beacon was, just a single point of light in a surging ocean of dark. It bobbed and fell and came and went, and twice we lost sight of it and had to stop, searching frantically before spotting it again.

The strong current was carrying the cage out to sea, and us with it. If we didn’t reach it soon, our muscles would fail and we’d drown. I kept this morbid thought to myself for as long as I could, but when the beacon disappeared a third time and we looked for it so long we couldn’t even be sure what section of the rolling black sea it had disappeared from, I shouted, “We have to go back!”

Emma wouldn’t listen. She swam ahead of me, farther out to sea. I grasped at her scissoring feet but she kicked me off.

“It’s gone! We aren’t going to find them!”

“Shut up, shut up!” she cried, and I could tell from her labored breaths that she was as exhausted as I was. “Just shut up and look!”

I grabbed her and shouted in her face and she kicked at me, and when I wouldn’t let go and she couldn’t force me to, she began to cry, just wordless howls of despair.

I tried to drag her back toward the lighthouse, but she was like a stone in the water, pulling me down. “You have to swim!” I shouted. “Swim or we’ll drown!”

And then I saw it—the faintest blink of red light. It was close, just below the surface. At first I didn’t say anything, afraid I’d imagined it, but then it blinked a second time.

Emma whooped and shouted. It looked like the cage had landed on another wreck—how else could it have come to rest so shallowly?—and because it had only just sunk, I told myself it was possible the birds were still alive.

We swam and prepared to dive for the cage, though I didn’t know where the breath would come from, we had so little left. Then, strangely, the cage seemed to rise toward us.

“What’s happening?” I shouted. “Is that a wreck?”

“Can’t be. There are none over here!”

“Then what the hell is that?”

It looked like a whale about to surface, long and massive and gray, or some ghost ship rising from its grave, and there erupted a sudden and powerful swell that came up from below and pushed us away. We tried to paddle against it but had no more luck than flotsam caught in a tidal wave, and then it thudded against our feet and we were rising, too, riding its back.

It came out of the water beneath us, hissing and clanking like some giant mechanical monster. We were caught in a sudden rush of foaming surf that raced off it in every direction, thrown hard onto a surface of metal grates. We hooked our fingers through the grates to keep from being washed into the sea. I squinted through the salt spray and saw that the cage had come to rest between what looked like two fins jutting from the monster’s back, one smaller and one larger. And then the lighthouse beam swept past, and in its gleam I realized they weren’t fins at all but a conning tower and a giant bolted-down gun. This thing we were riding wasn’t a monster or a wreck or a whale—

“It’s a U-boat!” I shouted. That it had risen right beneath our feet was no coincidence. It had to be what Golan was waiting for.

Emma was already on her feet and sprinting across the rolling deck toward the cage. I scrambled to stand. As I began to run a wave flashed over the deck and knocked us both down.

I heard a shout and looked up to see a man in a gray uniform rise from a hatch in the conning tower and level a gun at us.

Bullets rained down, hammering the deck. The cage was too far away—we’d be torn to pieces before we could reach it—but I could see that Emma was about to try anyway.

I ran and tackled her and we tumbled sideways off the deck and into the water. The black sea closed above us. Bullets peppered the water, leaving trails of bubbles in their wake.