Three-year-old little Xixi returns to the Gu family, running into Gu Mingshen who is deeply depressed and self-isolated. The soft and cute baby uses innocent words and tiny warm actions to slowly crack open his ice-sealed heart. She regards everyone in the Gu family as family, and also views Xiaoyue, whom she met at the orphanage, as an older sister. Little Xixi uses pure love to heal the oppressive family, melts the iceberg father, and fills the cold Gu family villa with laughter and joy once again.