A Xin, who grew up in Yilan town, runs a fruit shop at home. He is the eldest son beloved by his mother and the idol worshipped by his younger brother. He joined the school gymnastics team at a young age and volunteered to win the national championship. No matter how hard he practiced, he didn't feel bitter until the rebellious hormones of youth lost their ambition. A Xin gave up gymnastics, which he liked since he was a child, and mixed with his best friend pickles to form a gang. When he fights in groups in the street, he can apply his gymnastics skills and often win surprises.

The two inadvertently provoked the son of the underworld boss, and the cold dish of drugs made a big mistake. Both of them fled to Taipei, but they failed to turn over. On the contrary, they lost their best friend. A Xin, who is alone, only remembers the sentence in his heart when he was young: "When you want to cry, you stand upside down and tears will not flow out." When he returned to his hometown, he regained his frank enthusiasm and belief in gymnastics. He challenged himself and vowed to try again.