The nuns and midwives are busy preparing for Sister Evangelina’s surprise jubilee celebrations, marking 50 years since she took her vows, but a face from the past threatens to ruin…

A friend of Chummy’s, Reverend Applebee-Thornton, comes to stay at Nonnatus House and soon gets on everyone’s nerves. Meanwhile, Jenny and Sister Evangelina deliver a baby with spina bifida, and…