I’ve done what I always promised I wouldn’t. I’ve used my true voice in public. And it is as my mother always warned me it would be—there’s no way to take it back. I can’t bear to look at the horror on Justus’s face. Justus, who has known me all my life. I don’t dare glance back at the crowd to see who else has heard.

Though my feet are firmly on the ground of Atlantia, I’m dissolving.

My sister’s gone.

She decided to go Above.

She would never do this.

She did.

Bay asked me if I heard the city breathing.

I hear my own breathing now, in and out and in and out. I live here. I will die here.

I am never going to leave.

CHAPTER 2

Down in the deepmarket, the sellers call out, nudging their carts into people’s backs and bodies to get attention.

“Pure air!” someone shouts. “All flavors and scents. Cinnamon, cayenne, rose! Cedar, lilac, saffron!”

“Something new to wear!” another cries. There are shops up closer to the surface, near the temple, but down here the wares are much more varied—a jumbled flotsam and jetsam of junk and treasures. The goods are tumbled out in carts and stalls instead of arranged precisely behind glass windows. The selling stalls are dilapidated but utilitarian, pieced together out of old metal pilings and plastic slats.

Bay and I used to go everywhere together, and, after the temple, the deepmarket was the place we came most often after our mother died. I haven’t found any clues in the temple as to why Bay left, so I’ve come here to look for something. Anything. A message. A note. Any sign from her at all.

After the peacekeepers released me on the day Bay left, I went back to the room the two of us shared and tore it apart.

I had to find something that could explain what she’d done. Maybe, I thought, there would be a letter, labeled in her neat handwriting, explaining everything, bringing her motives to light.

I turned out the pockets of all of her clothes. I pulled off the bedspread, blankets, and sheets from her bed, heaved the mattress from the springs and looked underneath. I went through all of my own belongings, just in case. I even steeled myself and opened the box in the closet where we kept the last of my mother’s things, but everything was exactly as it had been when we packed it away. No note.

Nothing.

To go so suddenly, without any explanation, was cruel, and Bay was never cruel. She could be annoyed and sharp when she was tired or under stress. But those qualities in her were never as strong as they were in me—she was the gentler sister, quicker to laugh, certainly better suited to follow in my mother’s footsteps. I never resented it when people said that, because I knew it was true.

In the days since Bay left, I’ve done everything I can think of to get to her. I fought through the crowd at the temple until the peacekeepers pulled me back and put me in a holding area with other family members who’d shown signs of causing a scene. After they released us, I went to see the transport go to the surface, but of course it had already left. I stood there, trying to think of a way to follow, but the Council keeps a close watch on the transports and the locks that take them up. That is the only safe way for the living to go Above. Most of the transports are not pressurized for human survival. They’re meant for the transfer of goods and food between the Above and the Below.

And even in my most desperate imaginings, I know the Council won’t let me join my sister Above. They’ll never permit me to go and I can’t think of a viable way to escape.

As I walk past a stall in the deepmarket, I see brocades embroidered by someone well-skilled, and I almost reach out to touch the fabric, to linger looking over the designs. But I keep moving, pacing the length of the market way, leaving behind the crawl of stalls and coming out into the area at the edge of the deepmarket where the races take place.

In spite of the crush of people, it gets very cold in the deepmarket. The market’s hours are limited. Closing time coincides with the dimming time in order to conserve the energy it takes to heat this part of the city and keep the air going. We are deep down here. I shiver, though the walls of Atlantia have never been breached or broken in any significant way.

When the people prepared for the Divide long ago, they asked for inspiration in designing Atlantia. The story is that the Minister at the time had a dream, in which the gods told him that our city should be patterned after the grand cities of old. The Minister saw Atlantia clearly in his dream—a beautiful place of temples and churches set on plazas. He saw colorful buildings with shops on the ground floor and apartments rising above them, and boulevards and streets connecting everything together.

But, of course, it all had to be underwater.

And so Atlantia was conceived as a series of enormous enclosed bubbles, some higher than others, some lower, connected by canals and walkways. The engineers discovered that it was better to make smaller habitats and join them together than to create one large bubble for everything. The centermost sphere is the most desirable part of Atlantia. It holds the temple, the Council buildings, the upmarket, and several living areas. Other, smaller enclosures encompass the lesser churches, markets, and neighborhoods. Some of the deepest bubbles of all are the areas that encompass the machineries of Atlantia, the bays where the mining drones come in for repair and storage, and the deepmarket.

The engineers spent years designing all of this. Some of the original blueprints are on display in a special glass case in one of the antechambers of the temple. There are rusty stains and splatters on the diagrams. The rumor is that, as the engineers were dying, they sometimes coughed blood onto the papers. They couldn’t stop in their task or humankind would have perished, so they kept on at their sacred, consecrated work. When I mentioned the rumor about the spots on the paper being blood to my mother, she did not debunk it or say the stains were something else. “So many sacrificed for us to live,” she said, and her eyes were very sad.

The destruction Above meant that there were few natural materials left for use Below. Our city’s underpinnings are made mostly of manufactured goods, with some precious overlays of old materials like the wooden pulpit in the temple and the stones covering a few of the best streets. But Atlantia is still beautiful. One of the things we Atlantians are most proud of is our trees—made of steel trunks and individual, shimmering metallic leaves, they are as lovely as anything that ever existed Above.

So people say.