As a typhoon approaches, 5-year-old Duoduo is left alone at home by her grandma. Fearing that her grandma might encounter danger, she quietly sets out to search for her, but accidentally gets lost in unfamiliar streets. After learning the news, her mom rushes back from afar, while her dad, neighbors, and kind-hearted citizens also join the search. An accident makes this family, which was originally used to taking "someone looking after the child" as companionship, truly realize for the first time that what a child needs is never just care, but a sense of security and companionship. Having weathered the storm, the family also begins to relearn how to become a true family.