All the Colors of the Dark (Tutti i colori del bui (1972)

Jane lives in London with Richard, her boyfriend. When she was five, her mother was murdered, she recently lost a baby in a car crash and now she’s plagued by nightmares of a knife-wielding, blue-eyed man. Desperate to ease her pain, Jane decides to follow her new neighbor’s advice to attend a Black Mass, only to fan her already horrible visions, making her reality a living hell. Is there an escape from the clutches of the darkest evil?