The Jiang and Lin families have been enemies for generations. Jiang Yushu and Lin Weiguo have competed with each other since childhood, and even in their old age, they still fight over square dance partners, and especially bicker over their children's marriages, striving to have their own child get married before the other's. Pressured by their respective fathers to get married, Song Xingci and Lu Yanzhou end up on a blind date and have a flash marriage by a twist of fate. Lin Weiguo and Jiang Yushu happily prepare to meet their son-in-law and daughter-in-law, just about to see each other when Lin Weiguo and Jiang Yushu temporarily leave on separate matters. Song Xingci and Lu Yanzhou decide to live together, mutually hiding their identities as wealthy second-generation heirs, but their relationship is full of flaws in their daily interactions, ultimately leading both to drop their disguises and reveal their true feelings to each other.