This film tells the story of a community that was isolated due to the outbreak of the new coronavirus in early 2020. It takes the growth of the two young protagonists Lu Quan and Meng Meng as the clue, and interspersed with the various hardships and tests encountered by neighbors Grandpa Xu, security uncle, takeaway boy, community property management personnel, food delivery drivers, volunteers caring for elderly people living alone, and Meng Meng's family in the process of preventing and fighting the epidemic. It shows the spirit of mutual help and mutual assistance between neighbors under the shadow of the epidemic, and portrays a moving posture in the battle without gunpowder.