Zeng Li, a 28-year-old librarian, met Ai Jingchu, deputy chief dentist, because of his teeth correction. The two experienced walking together on snowy nights, playing hide-and-seek in the welfare home, and celebrating the New Year on the pirate ship... From misunderstanding to familiarity, they slowly walked into each other's hearts. Just when the two were about to express their feelings to each other, Yu Yi, the "first love" object that Zeng Li had been waiting for for ten years and Ai Jingchu's best friend, returned to China and launched a fierce pursuit of Zeng Li. After reading Zeng Li's novel "The Story of Xiao Yu and Xiao Yuer", Ai Jingchu misunderstood that the person Zeng Li liked in his heart had always been Yu Yi, so he gave up his confession plan and decided to go to Africa to perform a medical aid mission. However, Zeng Li became more clear about his love in his heart because of Yu Yi's sudden confession, and returned to Ai Jingchu without hesitation, and the two lovers finally got married.