Trixie and Sister Frances put their training into action as they join Dr Turner at the monthly cytology clinic, which is attracting a high number of patients for a routine cervical smear test. While there, Sister Frances examines a newly married woman who presents some troubling symptoms.Lucille helps Vivien, a single mother of three, through her fourth pregnancy and intervenes when local authorities question Vivien's capabilities as a mother. After suffering a traumatic experience, Miss Higgins is offered a place to stay at Nonnatus House, and Sister Hilda and Shelagh take the lead in the fight against a scabies epidemic that has quickly engulfed Poplar.