Sheng Huainan, a schoolboy at Peking University, accidentally met Luo Zhi, an ordinary girl from the same school. The two hit it off at first sight, and he was gradually attracted to her, but a text message from his ex-girlfriend told him that Luo Zhi was the "culprit" who destroyed his last relationship. In the process of investigating the truth, he discovered that Luo Zhi had a secret crush on him. In the story, the heroine is named Luo Zhi. For more than ten years, she has been performing this one-man show of secret love in her own world. She has complicated feelings for the hero Sheng Huainan. She is attracted by his excellence, and she is eager to surpass him because of some reasons from both families in the past. Because of Sheng Huainan, Luo Zhi followed all the way and was admitted to the best university. Because of various opportunities, Luo Zhi and Sheng Huainan finally got close. But the process of growth and the pressure of reality have put the two people through many tests. Can the two get together? Who picked up Luo Zhi's diary? Is there any change in Sheng Huainan's family? Will Luo Zhi's love for Sheng Huainan persist in the face of the test of reality? In the face of family and love, will this secret love end in vain?