Adolphus Gillespie Vernon Ware, Duke of Sale, has spent his life protected by relatives and servants who treat him as permanently fragile. When he learns that his cousin is being blackmailed by the beautiful foundling Belinda, he escapes his household and sets out incognito to solve the problem himself.
The attempt leads Gilly into debt, kidnapping, criminal schemes and a series of encounters beyond the controlled world of his estate. His adventure becomes a test of independence, allowing a shy young duke to discover practical courage and to return home capable of directing his own life.