Qian Jiayue, a 15-year-old "good girl", was admitted to a key high school in the city and began to face various learning challenges. Her plan to confess to her neighbor, the older brother and top student Xiao Han, also ended in failure. Her younger brother Maotou is smart but always gets into trouble. Qian Jiayue met a new friend Chen Mo with a sassy personality, and the girls grew up in friendship. At the same time, parents are experiencing a series of life changes such as family crisis and family reorganization. After Chen Xiu'e returned to the city as an educated youth, she was separated from Qian Jiayue because she was not with her for a long time. When her grandmother, Old Lady Chen, passed away, the emotional entanglement between three generations of mother and daughter was resolved. Chen Pengyu, who claims to be an elite, has cultivated a "disappointing" and rebellious daughter, Chen Mo. After the conflict between father and daughter, he also realized that each generation has its own "mission". After being laid off, the strong-willed Guan Aiping raised Xiao Han alone. "Little boss" Zhang Qiming learned to get along with his naughty son Maotou, and reorganized his family with Guan Aiping after several twists and turns. Times are changing, but the warm family affection remains unchanged, and the warmth of neighbors caring for each other remains unchanged.