Three-and-a-half-year-old Lu Duoduo returns to the big Lu family. Grandfather, who was initially not optimistic about his granddaughter, is overjoyed after seeing the innocent and sensible Duoduo, and her six older brothers also dote on her dearly. Little Duoduo is kind and thoughtful, using her pure childlike innocence to heal her family. Faced with outside rumors and unexpected situations, the Lu family members unite to protect her, staying together to spend warm and wonderful times.