The tongues of London high society gossips begin to wag when John Harmon - a young man whose inheritance depended on his marrying a woman he had never met - is found dead in the River Thames. The fortune passes into the hands of the working-class Boffins, who take into their new home both Bella Wilfer (Harmon's would-be bride), and a mysterious secretary known as Rokesmith. Meanwhile, Lizzie Hexam, the daughter of the boatman suspected of Harmon's murder, is pursued by two suitors: obsessive and self-righteous Bradley Headstone and roguish and lethargic Eugene Wrayburn. An expansive and varied cast of characters create an epic intertwining tale.