Fion (Liu Hana) and Xiaowei (Chen Ling) have been compared by their parents since they were young. Whether it is homework or piano, they are forced to compete with each other. In order to be pure good friends, they threw the piano score into the refrigerator to "freeze" before a very important piano competition. However, Fion did not play the piano like Xiaowei at the competition. Xiaowei fled to Ximending in disappointment. After meeting the stall boy Fan Dayin (Eddie Peng) and the skateboard boy Vance (Ethan Ruan), Xiaowei lived a different "fast youth life". In order to find Xiaowei, Fion set up the "Autumn Leaf Club" on the Internet. Fion accidentally met Xiaowei, who had already changed her face, on the street. After talking, the two shook hands and made peace. Fion was introduced to Fan Dayin and Vance by Xiaowei, which made her gradually experience a different taste of youth in a small group circle and began to work hard to get rid of the "fate" of being at the mercy of her parents. However, because of Fan Dayin, she and Xiaowei unconsciously became competitors again.