A dark-skinned human with four arms walks toward me across the floor of the club, clad only in a belt strung with human skulls. Her hair forms a smoky wreath around her open and curious face. She's interested in me.

"You're new around here, aren't you?" she asks, pausing in front of my table.

I stare at her. Apart from the neatly articulated extra shoulder joints, the body she's wearing is roughly ortho, following the traditional human body plan. The skulls are subsized, strung together on a necklace threaded with barbed wire and roses. "Yes, I'm a nube," I say. My parole ring makes my left index finger tingle, a little reminder. "I'm required to warn you that I'm undergoing identity reindexing and rehabilitation. I—people in my state—may be prone to violent outbursts. Don't worry, that's just a statutory warning: I won't hurt you. What makes you ask?"

She shrugs. It's an elaborate rippling gesture that ends with a wiggle of her hips. "Because I haven't seen you here before, and I've been coming here most nights for the past twenty or thirty diurns. You can earn extra rehab credit by helping out. Don't worry about the parole ring, most of us here have them. I had to warn people myself a while ago."

I manage to force a smile. A fellow inmate? Further along the program? "Would you like a drink?" I ask, gesturing at the chair next to me. "And what are you called, if you don't mind me asking?"

"I'm Kay." She pulls out the chair and sits, flipping her great mass of dark hair over her shoulder and tucking her skulls under the table with two hands as she glances at the menu. "Hmm, I think I will have an iced double mocha pickup, easy on the coca." She looks at me again, staring at my eyes. "The clinic arranges things so that there's always a volunteer around to greet nubes. It's my turn this swing shift. Do you want to tell me your name? Or where you're from?"

"If you like." My ring tingles, and I remember to smile. "My name's Robin, and you're right, I'm fresh out of the rehab tank. Only been out for a meg, to tell the truth." (A bit over ten planetary days, a million seconds.) "I'm from"—I go into quicktime for a few subseconds, trying to work out what story to give her, ending up with an approximation of the truth—"around these parts, actually. But just out of memory excision. I was getting stale and needed to do something about whatever it was I was getting stale over."

Kay smiles. She's got sharp cheekbones, bright teeth framed between perfect lips; she's got bilateral symmetry, three billion years of evolutionary heuristics and homeobox genes generating a face that's a mirror of itself—and where did that thought come from? I ask myself, annoyed. It's tough, not being able to tell the difference between your own thoughts and a postsurgical identity prosthesis.

"I haven't been human for long," she admits. "I just moved here from Zemlya." Pause. "For my surgery," she adds quietly.

I fiddle with the tassels dangling from my sword pommel. There's something not quite right about them, and it's bugging me intensely. "You lived with the ice ghouls?" I ask.

"Not quite—I was an ice ghoul."

That gets my attention: I don't think I've ever met a real live alien before, even an ex-alien. "Were you"—what's the word?—"born that way, or did you emigrate for a while?"

"Two questions." She holds up a finger. "Trade?"

"Trade." I remember to nod without prompting, and my ring sends me a flicker of warmth. It's crude conditioning: reward behavior indicative of recovery, punish behavior that reinforces the postsurgical fugue. I don't like it, but they tell me it's an essential part of the process.

"I emigrated to Zemlya right after my previous memory dump." Something about her expression strikes me as evasive. What could she be omitting? A failed business venture, personal enemies? "I wanted to study ghoul society from the inside." Her cocktail emerges from the table, and she takes an experimental sip. "They're so strange." She looks wistful for a moment. "But after a generation I got . . . sad." Another sip. "I was living among them to study them, you see. And when you live among people for gigaseconds on end you can't stop yourself getting involved, not unless you go totally post and upgrade your—well. I made friends and watched them grow old and die until I couldn't take any more. I had to come back and excise the . . . the impact. The pain."

Gigaseconds? Thirty planetary years each. That's a long time to spend among aliens. She's studying me intently. "That must have been very precise surgery," I say slowly. "I don't remember much of my previous life."

"You were human, though," she prods.

"Yes." Emphatically yes. Shards of memory remain: a flash of swords in a twilit alleyway in the remilitarized zone. Blood in the fountains. "I was an academic. A member of the professoriat." An array of firewalled assembler gates, lined up behind the fearsome armor of a customs checkpoint between polities. Pushing screaming, imploring civilians toward a shadowy entrance—"I taught history." That much is—was—true. "It all seems boring and distant now." The brief flash of an energy weapon, then silence. "I was getting stuck in a rut, and I needed to refresh myself. I think."

Which is almost but not quite a complete lie. I didn't volunteer, someone made me an offer I couldn't refuse. I knew too much. Either consent to undergo memory surgery, or my next death would be my last. At least, that's what it said I'd done in the dead-paper letter that was waiting by my bedside when I awakened in the rehab center, fresh from having the water of Lethe delivered straight to my brain by the molecular-sized robots of the hospitaler surgeon-confessors. I grin, sealing the partial truths with an outright lie. "So I had a radical rebuild, and now I can't remember why."

"And you feel like a new human," she says, smiling faintly.

"Yes." I glance at her lower pair of hands. I can't help noticing that she's fidgeting. "Even though I stuck with this conservative body plan." I'm very conservatively turned out—a medium-height male, dark eyes, wiry, the stubble of dark hair beginning to appear across my scalp—like an unreconstructed Eurasian from the pre-space era, right down to the leather kilt and hemp sandals. "I have a strong self-image, and I didn't really want to shed it—too many associations tied up in there. Those are nice skulls, by the way."

Kay smiles. "Thank you. And thank you again for not asking, by the way."

"Asking?"

"The usual question: Why do you look like, well . . ."

I pick up my glass for the first time and take a sip of the bitingly cold blue liquid. "You've just spent an entire prehistoric human lifetime as an ice ghoul and people are needling you for having too many arms?" I shake my head. "I just assumed you have a good reason."

She crosses both pairs of arms defensively. "I'd feel like a liar looking like . . ." She glances past me. There are a handful of other people in the bar, a few bushujo and a couple of cyborgs, but most of them are wearing orthohuman bodies. She's glancing at a woman with long blond hair on one side of her head and stubble on the other, wearing a filmy white drape and a sword belt. The woman is braying loudly with laughter at something one of her companions just said—berserkers on the prowl for players. "Her, for example."

"But you were orthohuman once?"

"I still am, inside."

The penny drops: She wears xenohuman drag when she's in public because she's shy. I glance over at the group and accidentally make eye contact with the blond woman. She looks at me, stiffens, then pointedlyturns away. "How long has this bar been here?" I ask, my ears burning. How dare she do that to me?