Cyril does not want a life of crime, but is emotionally blackmailed by his father into going along with his scheme to rob Finisham Maternity Hospital of its stock of contraceptive pills and sell them abroad.

Matron, on the other hand, has more than enough to contend with on the wards, with the gluttonous patient Mrs Tidey who seems more interested in eating than producing a baby, and her long-suffering British Rail worker husband who continually hangs around the waiting room.

The much put-upon Sister desperately tries to keep the ward in order, while Cutting's secretary, Miss Banks keeps her employer in check, but nothing can cool his pent-up desire to prove himself as a man, and it's Matron who's in his sights.

The criminal gang don disguises—Sid dresses as the foreign "Dr Zhivago" and Ernie as a heavily expectant mum—but the crime is thwarted by the mothers-to-be.

The medical hierarchy's threat to call the police is halted when Sid reveals the heroine of the day is a man, and the hospital realise they would suffer nationwide humiliation if anyone found out.