Sylvia, the daughter of a famous alchemist family, was divorced after her husband was incompetent and overworked, and then cheated on her with her sister-in-law. She is forced to leave her home during a storm. Weiss, rumored to be a "merchant of death," rescues Sylvia when she collapses on the road. He sees Sylvia's ability and offers her a contractual marriage. But the way he treats her is like that of a lover: "I was charmed by your beautiful eyes". Sylvia stands up to save him as an alchemist! A contract is the beginning of a doting marriage!