Cai Yuye has low self-esteem and is introverted. She is diligent and hardworking, but she is never good at studying. One day, the seat next to him suddenly became empty, and Zhuang Xiaozhi moved to the seat that had been vacant for two weeks. Zhuang Xiaozhi, who is good at playing the piano and studying well, suddenly walks into Cai Yuye's sight. Cai Yuye discovers her love for him, but this love makes her have strong self-doubt. After the high school entrance examination, Zhuang Xiaozhi originally planned to confess to Cai Yuye, but missed the opportunity because of Cai Yuye's escape. Zhuang Xiaozhi had no choice but to immigrate to Canada with his parents with regret. Although Cai Yuye is timid and cowardly, she has infinite energy and possibilities hidden in her body, but she is wrapped up in it without knowing it. During the summer after graduating from junior high school, Cai Yuye spent a wonderful vacation at her aunt's house in Canada. During this period, she met Zhuang Xiaozhi by chance. Fate seemed to involve each other. Cai Yuye began to change, and the rebellion of adolescence also followed. Cai Yuye gradually found the direction of his life.