A superstitious, illiterate young gypsy servant girl arrives to live with a reclusive female artist at her rural estate. The girl is haunted by persistent nightmares of a naked man on horseback tormenting and mistreating her. As the artist mentors the girl, their bond deepens into a passionate connection. Concurrently, the spectral horseman starts manifesting in the real world. The girl becomes convinced that he is a supernatural entity seeking vengeance.