Kevin had spent so much of his married life creating the ultimate sex machine for his wife to enjoy, but by the time the machine was finally ready for a human guinea pig, his wife had moved out and he had no lover to try it out on. Fortunately, Louise, his teenage daughter's best friend, treated the house like a second home and had always been curious about what was being built down in the cellar, so when she finds herself all alone in the house one day, and with the cellar door left open, Louise can't help but investigate....