Christopher Hatton owns the country estate Mordelaine. While Hatton's son Barney has a romantic tryst with Dilys Helmar, Hatton loses his estate in a game of dice to Dilys' father Nick.

The Hattons are forced to move to a cottage in a nearby village. One day Barney sees some villagers attacking a young woman, whom he rescues. She is Jassy Woodroofe, daughter of Tom Woodroofe and a gypsy mother. Jassy has the gift of second sight which causes the villagers to regard her as a witch.

Mrs Hatton hires Jassy as a domestic servant. Meanwhile, blacksmith Bob Wicks whips his daughter Lindy so badly she becomes mute, despite Tom Woodroofe coming to her rescue.

Nick Helmar and his family move into Mordelaine. Nick allows Christopher Hatton to continue gambling. When Hatton is caught cheating, he kills himself.

Nick finds his wife has been having an affair and asks for a divorce.

Tom Woodroofe leads a crowd of villagers to march on the Helmars, who are now their landlords, to demand better pay and conditions. Back in the village, Jassy senses something bad will happen and asks Barney to help. A drunken Nick confronts Tom and accidentally shoots him.

Jassy and Barney become close which worries Barney's mother. She sends her to a ladies' finishing school where she becomes friends with Dilys Helmar. Dilys sneaks out for a romantic tryst one night and when Jassy covers for her, Jassy is sacked.

Dilys takes Jassy home with her to Mordelaine. Nick tells Jassy that he killed her father.

Dilys and Jassy go to see Barney. Dilys and Barney resume their romance, which upsets Jassy, who still loves Barney and knows that Dilys is also seeing Stephen Fennell.

Nick offers Jassy the job of running Mordelaine. Jassy restructures of the staff, hiring the still mute Lindy at the recommendation of Mrs Wicks, but firing almost all the female staff.

One day, Jassy catches Dilys and Stephen together. Nick horsewhips Dilys, who runs out into the arms and carriage of Stephen. Barney goes to see Stephen and finds that he and Dilys are engaged.

Nick proposes marriage to Jassy, who agrees on condition he gives her Mordelaine as a wedding gift. They marry, but Jassy insists on living separately as their legal agreement says nothing of sleeping together. In a fury, Nick goes out riding and has an accident.

He is brought back to Mordelaine, where the doctor prescribes a strict diet and no alcohol, which Jassy enforces, even though Nick is increasingly violent towards her. When Jassy goes to visit Dilys and Stephen, Lindy decides to poison Nick for what he's done to Jassy, slipping rat poison into a bottle of brandy. Nick drinks it greedily.

Nick's murder is sensed by Jassy, who cries out that he's dead. Stephen thinks that this means that she has murdered him, and has her arrested along with Lindy.

At the trial, despite Jassy's alibi, both she and Lindy are found guilty, but the shock goads Lindy into speech. She confesses to the murder, exonerates Jassy, and drops dead.

Jassy signs over Mordelaine to Barney, its rightful heir, and explains she only married Nick to get the estate back to him, and the reunited couple kiss.

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