She didn't know that Perversion was ... in their Nature

This is the brutal story of a Psycho father (Joseph Marx) and adult son (Jon O'Brien) who drug, bind, gag and torture the son's pretty 18-year-old girlfriend Suzy (Bridgette Bayonne). After she refuses his clumsy sexual advances, dad offers Suzy a nightcap, which is laced with a drug cocktail. Soon poor Suzy is retching and convulsing, finally collapsing into a spittle smeared body into a back bedroom for further inspection. It soon becomes clear this isn't their first victim. Suzy is stripped, then subjected to a bound and gagged shower "cleansing", a double assault while taped hand and foot to a broom stick, copious hot waxing, a welt filled belt beating and a nipple twisting tit torture session with a rusty pair of pliers. Will poor Suzy escape the evil grasp of this father and son tag team of sickos?