Chu Yanyan is Bai Xu's little shadow, secretly writing down every little wish inspired by her unrequited love in her diary. At a birthday party, she accidentally falls down the stairs and loses all her memories. Annoyed by her clinginess, Bai Xu pushes her onto his older brother, Bai Zhiyuan, falsely claiming that his brother has always been the one taking care of her. When she discovers her diary, she assumes every word reveals her desire for Bai Zhiyuan. She decides to fulfill the wishes she had before losing her memory, following the diary step by step.