The parents of the sunny boy Huang Tiankuo (played by Peng Yuyan) run a bento shop. One day, when he was delivering bento to the hearing-impaired swimming team, he met the pure and beautiful sisters - Xiaopeng (played by Chen Yanxi) and Yangyang (played by Chen Yihan). The sisters' father is a missionary who works in Africa all year round. In order to ensure that her sister can successfully participate in the Deaflympics, Yangyang took on the responsibility of earning money for the family. She came and went in a hurry every day, working hard at several jobs. Tiankuo, who already mastered sign language, naturally integrated into the lives of the sisters. In order to get close to his favorite Yangyang, he often did business at the entrance of the gymnasium and took great pains to make a loving bento for Yangyang. Although the acquaintance was short, it brought the hearts of the two young people closer and closer. However, during a date, a small misunderstanding blocked their communication. At the same time, Xiaopeng also suffered a disaster...