Jenny does some district nursing to extend her community practice experience and befriends an old soldier with awful leg ulcers. Trixie and Cynthia enrol Winnie Lawson as a new patient.

A baby girl is snatched from her pram and the local community unites for the search. Cynthia sees another sort of loss as she tends to soon-to-be parents David and Margaret.

When Peggy’s brother is diagnosed with cancer, Jenny and the nuns are called upon to care for him. Jenny gets to know the siblings better. The Nonnatus House residents get involved in Fred’s latest money-making scheme which involves a pig called Evie.

When Chummy's imperious mother visits and disapproves of Peter Noakes, Chummy defies her mother and has her wedding on her own terms. Senile Sister Monica Joan is arrested for shoplifting.

Chummy makes an important decision, Jenny reconnects with Jimmy, and Cynthia's conduct is called into question after the death of a baby she delivered.

Jenny is seconded to a short-staffed hospital in London, but grows increasingly reluctant to carry out her duties when she finds out she is working under intimidating surgeon Mr Tracey. Back in Poplar, the midwives are introduced to newcomer Jane and outspoken twins Meg and Mave Carter. The sisters are identical in every way, except one of them is now pregnant - forcing them to come to terms with the impact a baby will have on them.

The convent comes under threat of demolition. Fred's pregnant daughter and her young son come and stay with him. Jenny is wooed by a new love interest. Chummy and PC Noakes prepare for the arrival of their baby.