The Zheng family in Longcheng is a common large family. The older generation has a close relationship, and the younger generation of three cousins is like a biological child. The parents of cousin Zheng Dongni (played by Ma Yili) have been in conflict for many years, and they are constantly beating and scolding each other. The broken growing environment has cultivated her rebellious and flamboyant character. She is eager to get rid of the influence of her original family and married abroad for this. Zheng Xijue (played by Bai Yu) has a gentle personality and is tolerant and generous. His parents died when he was young, and he was raised by his uncle and aunt, so he stayed in Longcheng to repay his gratitude. The younger sister Zheng Nanyin (played by Li Tingting) is the child of the uncle and aunt. Compared with Dongni and Xijue, she has a perfect family, the protection of her brothers and sisters, and is innocent and romantic. Xijue helped her uncle who suffered injustice to change his life, but she suffered a deep lovelorn. Fortunately, Dongni’s best friend Jiang Yi appeared at the right time, and the two gradually established feelings. Zheng Dongni’s marriage with her husband Fang Jinghui, a doctor, turned into a chicken feather and duck blood, and a divorce battle for children was fought from abroad to Longcheng. Zheng Nanyin got a marriage certificate right after entering college to resist her mother's control. Unexpectedly, campus couples are sad and have to return to the big family to recuperate. The three siblings have different destinies due to different choices, but they always influence and warm each other. Whenever they are in trouble, the big family can always give the deepest support to the three siblings. And as they grow up, they are also feeding back to the Zheng family in their own ways. In the end, Dong Ni grew from a rebellious girl to a mother who shoulders the responsibility of the family, and Xi Jue, who has always been considerate of others, has her own life. Nanyin also found herself and became an adult who can stand on her own.