The story is told from Chu Nanzhi's point of view. Chu Nanzhi always thought Pei Luowan was her best friend and treated her sincerely, but Pei Luowan was only interested in her money. They had gone to school together since childhood, and Chu Nanzhi was often ostracized when she was with her. Chu Nanzhi got into the last high school in the city, but Pei Luowan did not. Later, Pei Luowan transferred to that school. Before she arrived, Chu Nanzhi was not ostracized, but after she came, Chu Nanzhi was isolated again. Chu Nanzhi also realized something was wrong and began to suspect Pei Luowan.
Theme: Don't trust others easily. You can only trust yourself.