In Yunxi City, a small southern town in the 2010s, the river passed through the city, hiding a youthful and regretful youth. Lin Zhixu came back with the regrets of her previous life. The letter she failed to send, the unspoken "I like you", and Shen Tingbai's silent back were all regrets that she did not want to repeat again. In this life, she decided to take the initiative to get closer to Shen Tingbai, but Shen Tingbai, who was hearing-impaired and wore a hearing aid all year round, was used to building walls of alienation and always flinched when she approached. An encounter in the old bookstore at the back door of the school, the clumsy hand-holding and confession by the riverside, the "divine assist" of Xiao Song Yu'an, a righteous friend, Zhou Muye, a friend who broke away, and the silent protection of both mothers, allowed the two teenagers to slowly break the barriers as they entered and retreated, trying to rewrite the misses in their previous lives.
