The Boogeyman (1980 film)

The Boogeyman released in the United Kingdom as The Bogey Man is a 1980 American supernatural horror film directed by Ulli Lommel and starring Suzanna Love, John Carradine, and Ron James. The movies title refers to the longheld superstition of bogeymen beings, and its plot concerns an adult brother and sister who are targeted by the ghost of their mothers deceased boyfriend which has been freed from a imprisoned mirror.

The film opens with Willy and Lacey as children watching their mother and her boyfriend preparing to have sex. When the mother notices them, she has her boyfriend tie Willy to his headboard before sending Lacey to her room. Lacey frees Willy from his bed and Willy enters their room and repeatedly stabs his mothers boyfriend with a chef knife in front of a large mirror.Twenty years later, Lacey, now an adult, is married with a young son and lives with her aunt and uncle on a farm. Willy also lives with them, but has not spoken a word since the night he killed his mothers boyfriend, and sometimes, Willy takes various knives from the kitchen and hides them in a drawer. One night over dinner, Lacey finds a letter in the mail from her mother, who claims to be on her deathbed and wishes to see them one last time that night, Willy burns the letter. ........

Source: Wikipedia