Cordelia, the eldest daughter of the Vasquez family—one of the eight sacred houses—was one day sold to the Abrams family for money. What awaited her there were days filled with mistreatment as a daughter-in-law. Then, one day, her unfaithful husband lost all his memories in an accident. But within his body now resided the soul of the great archmage Leonard Atirei, who was supposed to be dead. Seeing this as a chance to finally gain her freedom, Cordelia handed Leonard the divorce papers—only for him to say, “If you want my signature, you’ll have to do as I say.” Finding this deal unfair, Cordelia countered with her own proposal: in exchange for keeping Leonard’s identity a secret, he must become her teacher. Although Leonard initially refused multiple times, he couldn’t ignore her pitiful situation and eventually agreed. Thus, the two entered into a master-and-disciple contract. However, while Cordelia’s husband—the heir to the family—remained without his memories, his stepmother and her brother took the opportunity to try to seize control of the household. Leonard and Cordelia set out on a journey to stop their schemes and to take revenge on Maximilian, the man who killed Leonard.