At twenty-seven, Ye Mo jumps into a river and loses his memory, with his mental age reverting to eighteen. Upon waking, he realizes the humiliating reality of his five years as a live-in son-in-law. His wife, Yun Cai, has treated him coldly for years, while her childhood friend, Fang Jie, constantly bullies him and schemes against him. Ye Mo abandons his former cowardly ways, tears up the breakup compensation check, storms into the Yun Corporation to expose Fang Jie's embezzlement conspiracy, and insists on getting a divorce. Enraged, Fang Jie attacks him with a knife, but Yun Cai takes the blow for Ye Mo and falls into a coma with serious injuries. While rebuilding his life, Ye Mo regains all his memories, and the two begin confronting the inferiority and controlling behavior that poisoned their marriage. Later, Fang Jie escapes from prison and attacks again. Yun Cai once more risks her life to save Ye Mo, and they discover that she is pregnant. The two finally resolve their old misunderstandings, learn to treat each other as equals, and ultimately welcome their child and spend the rest of their lives together.