
After his father's will stipulates he must marry Bella Wilfer to inherit his fortune, John Harmon fakes his death to avoid the marriage and the threats on his life. He returns as John Rokesmith and becomes the secretary for the Boffins, who inherit Harmon's estate following his alleged death.

A body pulled from the Thames is identified as young John Harmon, heir to a fortune made in dust-contracting. Bella Wilfer, his wife-to-be by terms of old Harmon's will, goes into mourning though she has never met her fiancé.

Lizzie Hexam, daughter of the corpse robber who found young Harmon's alleged body, is being courted by two desperate characters: Eugene Wrayburn, a dissolute barrister, and Bradley Headstone, a mentally-deranged schoolmaster.