Mrs. Johnstone gives birth to twin boys, Michael and Edward. She agrees to give one of the twins to her employer, Mrs. Lyons, who cannot have children of her own, so that she can continue seeing the child at work. However, Mrs. Johnstone worries that she will not be able to afford to care for both children on her own. The play explores the character of Mrs. Johnstone, a poor mother who gives one of her sons to a wealthy family, and the consequences this has.