We meet Matty, Hannah, and Lydia. Three young women who have come to London to become nannies in affluent homes in the Berkley Square area. Matty soon butts heads with the housekeeper. Hannah arrives in london with her baby, and Lydia replaces the aging Nanny Collins.
Hannah meets her young charges, Bertie and baby Charlie.
Lydia saves the day with her cooking, and Nanny Collins doesn't like all the attention that Lydia seems to be recieving. Matty is attracted to Mrs. McClusky's son, but she finds him hard to understand. Hannah foils a kidnapping of her son by her paternal grandmother.
The three nannies go on a special picnic together, and Lydia gets lost in the woods. Victoria's mother dies and Hugh makes a sinister remark.
Hannah is worried about her baby's health when an epidemic of typhoid breaks out in London. Lydia's crush on Hugh creates friction between her and Nanny Collins.
One of Hannah's charges dies on Coranation Day. She replaces the child with her own baby. Hugh attempts to molest Lydia, but convinces her not to say a word to anyone. Matty and Ned are caught kissing by the police, and Matty discovers that Ned is wanted for murder.
Matty and Lydia attend a shooting weekend at the Earl's estate. Matty can't stop thinking about Ned, and Tom shoots his father.Ned realises that he is in love with Matty.
Ned tries to rekindle his romance with Hannah, but Hannah is happy caring for her son. Hannah tells Matty that she is in love with William.
Lydia rescues a distraught Nanny Collins, and brings her home. The police find bodies of babies, and arrest Mrs. Bronowski for murder.
Jack clears Ned's name, but Ned must ship out with his the rest of his regiment. Mrs. Bronowski is found guilty and sentenced to death.
