Chapter One

Alice Leung has discovered the secrets of bats: how they see without seeing, how they own darkness, as we own light. She walks the halls with a black headband across her eyes, keening a high C-cheat cheat cheat cheat cheat cheat-never once veering off course, as if drawn by an invisible thread. Echolocation, she tells me; it's not as difficult as you might think. Now she sees a light around objects when she looks at them, like halos on her retinas from staring at the sun. In her journal she writes, I had a dream that was all in blackness. Tell me how to describe.

It is January: my fifth month in Hong Kong.

In the margin I write, I wish I knew.

After six, when the custodians leave, the school becomes a perfect acoustic chamber; she wanders from the basement laboratories to the basketball courts like a trapped bird looking for a window. She finds my door completely blind, she says, not counting flights or paces. Twisting her head from side to side like Stevie Wonder, she announces her progress: another room mapped, a door, a desk, a globe, detected and identified by its aura.

You'll hurt yourself, I tell her. I've had nightmares: her foot missing the edge of a step, the dry crack of a leg breaking. Try it without the blindfold, I say. That way you can check yourself.

Her mouth wrinkles. This not important, she says. This only practice.

Practice for what, I want to ask. All the more reason you have to be careful.

You keep saying, she says, grabbing a piece of chalk. E-x-p-e-r-i-m-e-n-t, she writes on the blackboard, digging it in until it squeals.

That's r