Fred is saddened when he hears that the Poplar Horticultural Show has been cancelled because he has been growing his large marrows. At the Turners, Shelagh receives a phone call from the Hong Kong adoption agency, who have alarming news. Someone from May's past has arrived in the U.K. and is keen to see the little girl. The Turners must decide how to react as they hope to keep their plans to adopt her on track. Meanwhile, at clinic, Valerie's cousin Maureen is heavily pregnant.
Lucille is seconded to St. Cuthbert's and delivers a baby in an elevator. Nurse Crane goes to a school to give vaccines to new students. Violet, Trixie, Sister Frances, and Valerie put on a charity fashion show for the community.
Fred and Sister Monica Joan catch a woman stealing the team's milk. When they learn she's pregnant, they bring her into the care of the maternity home. Romance blooms between Miss Higgins and Sergeant Woolf.