 Margit and her older sister, Katla, flee their homeland in Iceland after their mother is killed for practicing witchcraft. Needing a place to stay, Katla casts a spell over a young farmer named Jóhann which makes him fall in love with her, ensuring the wellbeing of herself and Margit. Jóhann s son, Jóhas, sees through Katla s plan and pleads for his father to make her go away. To help Jóhas in his struggle, Margit s mother appears to Margit in visions and provides a magic amulet of protection for the boy. Will Jóhas be able to rid his family of Katla or will she continue to control them with her witchcraft?