Christmas is coming, and in Poplar the midwives of Nonnatus House are busier than ever. When an abandoned baby is discovered on the steps of the convent, the whole community rallies round to provide food and clothing, and to try and trace his mother. Nurse Jenny Lee (Jessica Raine) meanwhile, gets caught up in the heartbreaking mystery that surrounds an elderly, semi-vagrant local woman, Mrs Jenkins (Sheila Reid). For newly married Chummy (Miranda Hart), other challenges await, as she pulls out all the stops to mount a truly memorable children's nativity play.
The Christmas special of the BBC drama, adapted from Jennifer Worth's memoirs, about a group of midwives working in East London in the 1950s. The discovery of an abandoned baby on the convent's doorstep proves to be a catalyst, as the community come together to try to trace the baby's mother. Meanwhile, Jenny Lee (Jessica Raine) finds herself drawn into the mystery surrounding elderly local woman Mrs Jenkins (Sheila Reid), while Chummy (Miranda Hart) is determined to stage an unforgettable nativity play.