Li Wan appears to be an ordinary nanny, but she is secretly married to Gu Yan, the president of the Gu Group. At the baby's one-month celebration, she suffers endless humiliation from her husband's family. Meanwhile, her grandson, Chengcheng, is diagnosed with a rare genetic disease, and her son-in-law, Zhang Hao, betrays her through an affair and the theft of business secrets. Li Wan endures the humiliation in silence while Gu Yan secretly puts plans in motion to protect her. At last, their true identities are revealed at a wedding, all the villains are brought to justice, a targeted medication is successfully developed, and the family finally gets its happy ending.