Sprawling costume drama casts Margaret Lockwood as a gypsy girl Jassy who has second sight. She gets a job as maid in the household of a once-great family who have lost everything due to father's (Dennis Price) gambling. But she falls in love with the son (Dermot Walsh) whose ambition it is to regain the family estate from the cruel master (Basil Sydney).
Later, Jassy gets a job at the school for girls where she befriends the daughter of the cruel master (Patricia Roc) and poses as her friend when the girl is expelled from the school. She moves into the estate where she is made housekeeper. But the cruel master has his eye on her.
In another storyline, a brutish blacksmith beats his wife and daughter (Esma Cannon) causing the daughter to lose her voice via a throat injury. She eventually gets a job as maid in the estate where Jassy has gone to live. The "loony" as she is called, becomes the devoted slave to Jassy.
After a riding accident, the cruel master is saved by the loony. He is returned to his estate where Jassy takes full control. But after his death Jassy and the loony are accused of murder.
Lockwood is terrific as Jassy, the gypsy girl who is kinder and truer than all the grand people around her. Cannon turns is a superb performance as the pitiful loony. Dennis Price, Patricia Roc, Dermot Walsh, and Basil Sydney are also very good. Co-stars include Linden Travers, Ernest Thesiger, Cathleen Nesbitt, Susan Shaw, Hugh Pryse, Jean Cadell, Beatrice Varley, Torin Thatcher, and Nora Swinburne.