The novel is set in and around "Uncle Corny's" garden near Sunbury-on-Thames. The story turns on the love of Kit, the market-gardener's nephew, for Kitty, the daughter of a good but foolish scientific man, who has succeeded in making his own and his daughter's life miserable by marrying a second wife. This lady and her son Donovan are the villains of the story, and by their machinations poor Kit and Kitty are separated and made miserable.