A woman, who witnessed her father kill himself as a child, invites several friends to her husband's secluded castle. Unbeknownst to them, she has a sinister motive for the invitation.

As a Child Mariale witnesses her father kill her mother. Years later, she spends her life with little contact from the outside world living in a gloomy castle. One day, however Mariale decides to invite some friends over the weekend, but as the decadent party turns into an unbridled orgy the first gruesome murder occurs.