Shelley's summer is ruined by the fact that her parents are separating. She withdraws from the real world and lives in her own fantasy world of magic and music.

The daughter of a thief, young Moll is placed in the care of a nunnery after the execution of her mother. However, the actions of an abusive priest lead Moll to rebel as a teenager, escaping to the dangerous streets of London. Further misfortunes drive her to accept a job as a prostitute from the conniving Mrs. Allworthy. It is there that Moll first meets Hibble, who is working as Allworthy's servant but takes a special interest in the young woman's well-being. With his help, she retains hope for the future, ultimately falling in love with an unconventional artist who promises the possibility of romantic happiness.