Don Compton (a more than convincing Jeffrey Hurst) and his wife Frances (Crystal Sync, who gives a very credible performance) are experiencing marital problems stemming from adultery, which are aggravated by the disturbing presence of Karen, Frances's mentally ill sister (played histrionically by a disturbing Tara Chung), who lives with the couple but has now been relegated to the couple's second home on the beach, where she suffers disconnections from reality that lead to dramatic and homicidal madness.
Writer-director Roberta Findlay's strange and sordid horror-tinged melodrama offers a solid and satisfying mix of explicit and daring sex with moments of bloody violence. Furthermore, Findlay makes impeccable and effective use of strange ghostly whispers and strange noises on the soundtrack to convey Karen's descent into complete psychotic madness. The solid cast of Golden Age adult film regulars helps a lot: Jennifer Jordan as the bitter and insolent Estelle, Jake Teague as the smarmy psychiatrist Otis, Marlene Willoughby as the annoying neighbor Fannie, and Michael Gaunt as the sleazy Larry. Walter Sear's melancholic vintage score further enhances the overall eccentric atmosphere. A piece of unusual, original, and highly enjoyable hardcore.