Sylvia Alcaul, a young woman living alone in the mountains, is recruited by a royal official to become an alchemist in the frontier city of Elanberg, replacing her missing mother. She discovers that her alchemical powers require absorbing semen, which she is authorized to collect from residents. After being “awakened” as an alchemist through sexual encounters, Sylvia begins working on civic projects like road construction, accompanied by the mayor’s capable secretary Liza.