Arsène Migliore is a twenty-six-year-old poison assassin continuing his family’s infamous legacy. Six feet tall with tousled black hair, pale skin, and sharp features hardened by training, he carries his lineage’s weight. Ordered to kill a renowned marriage swindler who appears as a beautiful woman but is secretly male, Arsène changes course when his sister Ivy surrenders to their family’s marriage demands. Desperate to save her, he offers the swindler her life in exchange for becoming his wife.