The poor peasant's child, Little Shizhu, arrives in the city from the countryside with full confidence to participate in training at an amateur sports school. Once, a child nicknamed Little Hammer is practicing on the pommel horse when Chen Chao comes over to compete with him for the equipment. Little Shizhu steps in to mediate. 　　 The sports school students go to the countryside to participate in labor. After the work is done, the students perform impressive athletic events for the poor and lower-middle peasants under the moonlight, earning their praise. During the selection trials, while performing a giant swing on the horizontal bar, Little Shizhu’s handguard snaps, causing him to fall. It turns out that Little Shizhu’s handguard had been sabotaged by the gymnastics team’s orthopedic doctor, the class enemy Zhang Jinlong. After the conspiracy is exposed, he is exposed and seized by the masses.