A rising actress, Gu Qingman, sacrifices her career to be with a seemingly devout man, Shen Yichen, who imposes three impossible vows. Five years later, his ex-girlfriend returns, exposing Shen's hypocrisy as he breaks his own precepts for her while cruelly mistreating Gu Qingman. Realizing his betrayal, Gu Qingman reclaims her life, career, and a new love, leaving Shen Yichen consumed by regret and the weight of his broken vows.