Mr Merdle's death and the collapse of Merdle's Bank sends shockwaves through London as thousands face financial ruin. Arthur returns to the Marshalsea a prisoner, and Amy goes back to her birthplace to look after him as he lies gravely ill.
Mr. Dorrit returns to Venice a broken man after a visit to London revives some unwelcome memories. Meanwhile, Arthur warns his mother that she may be in danger from Rigaud, and he is reunited with Amy once more.
Mr. Dorrit leaves Amy behind in Venice as he returns to London with newlyweds Fanny and Sparkler, but the high life is not all he had hoped it would be. Meanwhile, Arthur invests Doyce and Clennam's capital in Merdle's Bank.
Romance is in the air as Mrs. General starts her campaign to woo Mr. Dorrit, and Fanny turns the full beam of her attention on Sparkler. Meanwhile, an unwelcome reminder of the old days comes to haunt Mr. Dorrit in Venice.
Fanny has stolen the heart of Edmund Sparkler, whose mother is determined to separate them. Meanwhile, Merdle's Bank is besieged by investors, and Arthur is worried when he sees a suspicious French stranger, the villainous Rigaud, at his mother's house.