A young woman wakes inside an unfamiliar existence: she has been summoned into being as a shikigami — a spirit servant bound to an Onmiyouji named Abeno Seimei. She has no memory of anything before this moment but holds a conviction that she was once human, and that her name is Sayuki. Seimei lays out her options plainly: accept what she is, or cease to exist. She accepts. Her new life in the ancient capital of Izumi consists of arbitrating quarrels between couples, carrying love letters across the city for clients, and occasionally fighting demons. Whether she will ever feel at home in this existence is a question the game does not rush to answer.