Rue des Tisserands is a street like any other — until the evening Sarah Vasseur looks up and finds a door where there has only ever been a blind brick wall. A red door. Engraved with her name.

For eleven years, Sarah has built her life around precision: dates, deeds, and dossiers at the Municipal Archives, and a solitude she has stopped bothering to name. Then dusk falls, the door opens, and on the other side she finds everything she never let herself want — a husband who adores her, a daughter who runs into her arms, a home lit gold and warm as a held breath.

But happiness this perfect always keeps a ledger. As the weeks pass, Sarah's real life crumbles hour by hour, memory by memory — and the family behind the door begins to know her a little too well. Somewhere behind those golden walls, something is learning to become her completely.

To save what's left of herself, Sarah will have to walk back through that door one final time — not to escape her life, but to steal it back.