Horror House

In swinging London, a group of twenty-something friends are attending a rather dull party, and they decide to gather for kicks at an old supposedly haunted mansion where one of their number used to play as a child. Among the group is American ringleader Chris, his bored partygirl girlfriend Sheila, promiscuous Sylvia who has her eye on handsome two-timing Gary, and his "good girl" date Dorothy. Also tagging along are nervous, heavy-set Madge and her sarcastic, hot-tempered boyfriend Peter, sweet faced Richard, and his friend Henry. They are all followed by Paul Kellet, Sylvia's older jealous married ex-boyfriend.