Su Hui kindly takes in her half-sister Su Xiaoyan and her aunt Li Guilan, only for Su Xiaoyan to grow jealous of Su Hui's marriage and covet the position of the Chen family's young madam. She drugs her sister into a deep sleep, throws herself at her brother-in-law Chen Kai, and when he rejects her, schemes to obtain his sample to fake her way into the family. Su Hui accidentally overhears their plan and lays a trap in advance, swapping the sample. Clutching the report, Su Xiaoyan falsely claims she is carrying the Chen family's first grandchild and clings to the Chen household, where she treats Su Hui's daughter Duoduo however she pleases.