Chen Guifen, an award-winning postpartum nanny, gives up her high-paying job to go to her daughter's home and care for her newborn grandchild. Faced with her in-law's blind faith in the Ling Shu AI system and its strict controls, Chen Guifen relies on her fifteen years of professional experience, clashing with its rigid data-driven recommendations over feeding and childcare. Despite the pressure, she uses scientific observation to correct harmful parenting practices. In the end, she resolves the family conflict, protects the baby's healthy growth with love and expertise, and mends the relationships between mother and daughter and between the two mothers-in-law.