The solution came from the civilians, not the crew. Some of them had been farmers or herbalists before the crisis, and a few had brought little bags of seeds. If we could provide them with the necessary equipment, they might be able to start raising enough food to stretch our existing provisions for years. It was an audacious plan, but not completely without merit. The missile room was certainly large enough for a garden. Pots and troughs could be hammered out of existing materials, and the ultraviolet lamps we used for the crew’s vitamin D treatment could serve as artificial sunlight.

The only problem was soil. None of us knew anything about hydroponics, aeroponics, or any other alternate agricultural method. We needed earth, and there was only one way to get it. The captain had to consider this carefully. Trying to deploy a shore party was as dangerous as, if not more than, attempting to board an infested ship. Before the war, more than half of all human civilization lived at or near the world’s coastlines. The infestation only increased this number as refugees sought to flee by water.

We began our search off the mid-Atlantic coast of South America, from Georgetown, Guyana, then down the coasts of Surinam, and French Guyana. We found several stretches of uninhabited jungle, and at least by periscope observation, the coast appeared to be clear. We surfaced and made a second, visual sweep from the bridge. Again, nothing. I requested permission to take a landing party ashore. The captain was not yet convinced. He ordered the foghorn blown…loud and long…and then they came.

Just a few at first, tattered, wide-eyed, stumbling out of the jungle. They didn’t seem to notice the shoreline, the waves knocking them over, pushing them back up on the beach or pulling them out to sea. One was dashed against a rock, his chest crushed, broken ribs stabbing through the flesh. Black foam shot from his mouth as he howled at us, still trying to walk, to crawl, in our direction. More came, a dozen at a time; within minutes we had over a hundred plunging into the surf. This was the case everywhere we surfaced. All those refugees who’d been too unlucky to make it to the open ocean now formed a lethal barrier along every stretch of coastline we visited.

Did you ever try to land a shore party?

[Shakes his head.] Too dangerous, even worse than the infested ships. We decided that our only choice was to find soil on an offshore island.

But you must have known what was happening on the world’s islands.

You would be surprised. After leaving our Pacific patrol station, we restricted our movements to either the Atlantic or the Indian Ocean. We’d heard transmissions or made visual observations of many of those specks of land. We learned about the overcrowding, the violence…we saw the gun flashes from the Windward Islands. That night, on the surface, we could smell the smoke as it drifted east from the Caribbean. We could also hear islands that weren’t so lucky. The Cape Verdes, off the coast of Senegal, we didn’t even see them before we heard the wails. Too many refugees, too little discipline; it only takes one infected soul. How many islands remained quarantined after the war? How many frozen, northern rocks are still deeply and dangerously in the white?

Returning to the Pacific was our most likely option, but that would also bring us right back up to our country’s front door.

Again, we still did not know if the Chinese navy was hunting us or even if there was still a Chinese navy. All we knew was that we needed stores and that we craved direct contact with other human beings. It took some time to convince the captain. The last thing he wanted was a confrontation with our navy.

He was still loyal to the government?

Yes. And then there was…a personal matter.

Personal? Why?

[He skirts the question.]

Have you ever been to Manihi?

[I shake my head.]

You couldn’t ask for a more ideal image of a prewar tropical paradise. Flat, palm-covered islands or “motus” form a ring around a shallow, crystal-clear lagoon. It used to be one of the few places on Earth where they cultured authentic black pearls. I had bought a pair for my wife when we visited Tuamotus for our honeymoon, so my firsthand knowledge made this atoll the most likely destination.

Manihi had changed utterly since I was a newly married ensign. The pearls were gone, the oysters were eaten, and the lagoon was crowded with hundreds of small, private boats. The motus themselves were paved with either tents or ramshackle huts. Dozens of improvised canoes either sailed or rowed back and forth between the outer reef and the dozen or so large ships that were anchored in deeper water. The whole scene was typical of what, I guess, postwar historians are now calling “the Pacific Continent,” the refugee island culture that stretched from Palau to French Polynesia. It was a new society, a new nation, refugees from all over the world uniting under the common flag of survival.

How did you integrate yourself into that society?

Through trade. Trade was the central pillar of the Pacific Continent. If your boat had a large distillery, you sold fresh water. If it had a machine shop, you became a mechanic. The Madrid Spirit, a liquefied natural gas carrier, sold its cargo off for cooking fuel. That was what gave Mister Song his idea for our “market niche.” He was Commander Song’s father, a hedge-fund broker from Shenzhen. He came up with the idea of running floating power lines into the lagoon and leasing the electricity from our reactor.

[He smiles.]

We became millionaires, or…at least the barter equivalent: food, medicine, any spare part we needed or the raw materials to manufacture them. We got our greenhouse, along with a miniature waste recovery plant to turn our own night soil into valuable fertilizer. We “bought” equipment for a gymnasium, a full wet bar, and home entertainment systems for both the enlisted mess and wardroom. The children were lavished with toys and candy, whatever was left, and most importantly, continuing education from several of the barges that had been converted into international schools. We were welcomed into any home, onto any boat. Our enlisted men, and even some of the officers, were given free credit on any one of the five “comfort” boats anchored in the lagoon. And why not? We lit up their nights, we powered their machinery. We brought back long forgotten luxuries like air conditioners and refrigerators. We brought computers back online and gave most of them the first hot shower they’d had in months. We were so successful that the island council even allowed us a reprieve, although we politely refused, from taking part in the island’s perimeter security.

Against seaborne zombies?

They were always a danger. Every night they would wander up onto the motus or try to drag themselves up the anchor line of a low-lying boat. Part of the “citizenship dues” for staying at Manihi was to help patrol the beaches and boats for zombies.

You mentioned anchor lines. Aren’t zombies poor climbers?

Not when water counteracts gravity. Most of them only have to follow an anchor chain up to the surface. If that chain leads to a boat whose deck is only centimeters above the water line…there were at least as many lagoon as beach attacks. Nights were always worse. That was another reason we were so welcome. We could take back the darkness, both above and below the surface. It is a chilling sight to point a flashlight at the water and see the bluish-green outline of a zombie crawling up an anchor line.

Wouldn’t the light tend to attract even more of them?

Yes, definitely. Night attacks almost doubled once mariners began leaving their lights on. The civilians never complained though, and neither did the island’s council. I think that most people would rather face the light of a real enemy than the darkness of their imagined fears.

How long did you stay in Manihi?

Several months. I don’t know if you would call them the best months of our lives, but at the time it certainly felt that way. We began to let our guard down, to stop thinking of ourselves as fugitives. There were even some Chinese families, not Diaspora or Taiwanese, but real citizens of the People’s Republic. They told us that the situation had gotten so bad that the government was barely keeping the country together. They couldn’t see how, when over half the population was infected and the army’s reserves were continuing to evaporate, they had the time or assets to devote any energy to find one lost sub. For a little while, it looked as if we could make this small island community our home, reside here until the end of the crisis or, perhaps, the end of the world.

[He looks up at the monument above us, built on the very spot where, supposedly, the last zombie in Beijing had been destroyed.]

Song and I had shore patrol duty, the night it happened. We’d stopped by a campfire to listen to the islanders’ radio. There was some broadcast about a mysterious natural disaster in China. No one knew what it was yet, and there were more than enough rumors to keep us guessing. I was looking at the radio, my back to the lagoon, when the sea in front of me suddenly began to glow. I turned just in time to see the Madrid Spirit explode. I don’t know how much natural gas she still carried, but the fireball skyrocketed high into the night, expanding and incinerating all life on the two closest motus. My first thought was “accident,” a corroded valve, a careless deckhand. Commander Song had been looking right at it though, and he’d seen the streak of the missile. A half second later, the Admiral Zheng’s foghorn sounded.

As we raced back to the boat, my wall of calm, my sense of security, came crashing down around me. I knew that missile had come from one of our subs. The only reason it had hit the Madrid was because she sat much higher in water, presenting a larger radar outline. How many had been aboard? How many were on those motus? I suddenly realized that every second we stayed put the civilian islanders in danger of another attack. Captain Chen must have been thinking the same thing. As we reached the deck, the orders to cast off were sounded from the bridge. Power lines were cut, heads counted, hatches dogged. We set course for open water and dived at battle stations.

At ninety meters we deployed our towed array sonar and immediately detected hull popping noises of another sub changing depth. Not the flexible “pop-groooaaan-pop” of steel but the quick “pop-pop-pop” of brittle titanium. Only two countries in the world used titanium hulls in their attack boats: the Russian Federation and us. The blade count confirmed it was ours, a new Type 95 hunter-killers. Two were in service by the time we left port. We couldn’t tell which one.

Was that important?

[Again, he does not answer.]

At first, the captain wouldn’t fight. He chose to bottom the boat, set her down on a sandy plateau at the bare limit of our crush depth. The Type 95 began banging away with its active sonar array. The sound pulses echoed through the water, but couldn’t get a fix on us because of the ocean floor. The 95 switched to a passive search, listening with its powerful hydrophone array for any noise we made. We reduced the reactor to a marginal output, shut down all unnecessary machinery, and ceased all crew movement within the boat. Because passive sonar doesn’t send out any signals, there was no way of knowing where the 95 was, or even if it was still around. We tried to listen for her propeller, but she’d gone as silent as us. We waited for half an hour, not moving, barely breathing.

I was standing by the sonar shack, my eyes on the overhead, when Lieutenant Liu tapped me on the shoulder. He had something on our hull-mounted array, not the other sub, something closer, all around us. I plugged in a pair of headphones and heard a scraping noise, like scratching rats. I silently motioned for the captain to listen. We couldn’t make it out. It wasn’t bottom flow, the current was too mild for that. If it was sea life, crabs or some other biologic contact, there would have to be thousands of them. I began to suspect something…I requested a scope observation, knowing the transient noise might alert our hunter. The captain agreed. We gritted our teeth as the tube slid upward. Then, the image.

Zombies, hundreds of them, were swarming over the hull. More were arriving each second, stumbling across the barren sand, climbing over each other to claw, scrape, actually bite the Zheng’s steel.

Could they have gotten in? Opened a hatch or…

No, all hatches are sealed from the inside and torpedo tubes are protected by external bow caps. What concerned us, however, was the reactor. It was cooled by circulating seawater. The intakes, although not large enough for a man to fit through, can easily be blocked by one. Sure enough, one of our warning lights began to silently flash over the number four intake. One of them had ripped the guard off and was now thoroughly lodged in the conduit. The reactor’s core temperature began to rise. To shut it down would leave us powerless. Captain Chen decided that we had to move.

We lifted off the bottom, trying to be as slow and quiet as possible. It wasn’t enough. We began to detect the sound of the 95’s propeller. She’d heard us and was moving in to attack. We heard her torpedo tubes being flooded, and the click of her outer doors opening. Captain Chen ordered our own sonar to “go active,” pinging our exact location but giving us a perfect firing solution on the 95.

We fired at the same time. Our torpedoes passed each other, as both subs tried to get away. The 95 was a little bit faster, a little more maneuverable, but the one thing they didn’t have was our captain. He knew exactly how to avoid the oncoming “fish,” and we ducked them easily right about the time our own found their targets.

We heard the 95’s hull screech like a dying whale, bulkheads collapsing as compartments imploded one after the other. They tell you it happens too fast for the crew to know; either the shock of the pressure change renders them unconscious or the explosion can actually cause the air to ignite. The crew dies quickly, painlessly, at least, that’s what we hoped. One thing that wasn’t painless was to watch the light behind my captain’s eyes die with the sounds of the doomed sub.

[He anticipates my next question, clenching his fist and exhaling hard through his nose.]