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Ge Yongge and Hong Chen studied at a medical school in Chongqing. They were both sophomore clinical majors. Because of a club recruitment, the two joined the school's badminton club together and began their badminton life for a year and a half. After entering the badminton club, they met all kinds of people in the gym. Some of them were retired faculty and staff of the school. They were over 50 years old, experienced but not domineering. From time to time, they gave guidance to students who were in the bottleneck period; They are immersed in one person's world; some people are lively and cheerful by nature, like a live fish swimming in the gymnasium, bringing surprising words and jokes from time to time... They gradually understand that the greatness of badminton is not only about training one's body, but more often, it brings people a belief and a pursuit.

High school student "Zong Bai" was forced to break into a mysterious organization because of the "Jigongling Shooting Incident". On the road of not knowing whether he has a future, he explores the secrets of the three major halls, and finally the ending of the "Black Stone".