25-year-old sister Jiangnan (played by Zhang Yezi) and 22-year-old brother Jiangbei (played by Zhang Yishan) grew up, but their parents divorced. The two apartments upstairs and downstairs were divided into two. Jiangnan lived in the upstairs apartment with her mother Wu Qiong (played by Wang Lin), and Jiangbei lived in the downstairs apartment with his father Jiang Guoli (played by Zhou Xiaobin). Soon, 50-year-old Jiang Guoli married 35-year-old fitness coach Dai Lingling (played by Song Ning) and brought an 8-year-old child Tongtong (played by Peng Yibo). 49-year-old Wu Qiong married actor Du Wei (played by Gao Yalin), whom she admired when she was young. Du Wei also has a 12-year-old daughter Yangyang (played by Guo Xinru). The four children made their parents worry a lot. In the eyes of the children, their parents also controlled them too much, adding a lot of troubles to them. The plot revolves around these two reconstituted families, the very representative parents, and four children with very different personalities. These originally unrelated groups of people have re-formed a big family. Parents and children, children and children, have worries, troubles and conflicts. In the process of dealing with these worries, troubles and conflicts, this fragmented family is slowly moving towards integration, performing complex and interesting stories about daily life and the emotional world.