Mara wanted to know who had made it. The domain registration pointed nowhere. The code, when she pried it open, was older than it looked — lines of thoughtful, human-commented notes tucked between fragments of obfuscation. Whoever had built it had known how easily people would barter with their pasts and had left a single line of plain text: For those who can’t hold what they loved.

Curiosity turned into rules. The community around the link gave itself quiet laws: never request another's trauma, never ask for living people's secrets, and always—always—offer back a small thing in exchange. They traded photos, hand-drawn postcards, recipes remembered from fading relatives. The site, inscrutable and patient, accepted these tiny payments and responded with treasures shaped like absence.

"Welcome back. If you’re reading this, you are permitted one memory exchange."

They found the link scratched into the underside of an old cassette box at the flea market: www.sxe.net/2021. It wasn't a URL anyone used anymore, and that only made it more tempting. Mara could have left it, but curiosity tugged at her like a loose thread.

The next morning she got a parcel in the post: nothing more than a rectangle of pressed paper and thread, aged as if found at the bottom of a drawer. It was a kite — not the one she’d lost, but a child's kite painted with colors she’d never seen together. Tied to its tail was a note in a hand that slanted like a question: For holding what you cannot.