Li Shenyu has a sincere father-daughter love with his biological father since childhood, but since his father passed away and his mother remarried, Shenyu has changed. She misses her father whenever she sees a middle-aged man. Yin Xingzai is the general manager of a company with a happy family and a successful career. He often feels that youth has suddenly left him. By chance, Yin Xingzai met Li Shenyu, a girl who was half his age and worked as a dance teacher in a gym. He experienced a real and intense love that he had never experienced before, and wanted to try the kind of missing, throbbing and previous feelings in love. Yin Xingzai found that he had found something that was missing in his life. The encounter of the two completely changed the trajectory of their respective destinies...