Tang Yibai (Xiong Ziqi) is a member of the swimming team of South Physical Education University. After several years of preparation, he decided to return to the competition on the occasion of the college swimming league. His coach and good friend Qi Ruifeng (Huang Shengchi) became his solid backing. By chance, Tang Yibai met an intern reporter named Yun Duo (Tan Songyun), and the two formed an indissoluble bond between them. Yun Duo rented the apartment rented by Tang Yibai's mother without knowing it, and the two children began to live together under the same roof. In the process of getting along, Tang Yibai and Yun Duo gradually developed a pure relationship. However, with the competition imminent, a series of accidents made Tang Yibai discover that he could only choose one between career and love. In the end, what choice will this man who regards swimming as his lifelong career make?