Virginal nerd Jon Pigeon works in a peculiar sex research institute in which patients run about the corridors naked, nude aerobics are encouraged and where no man is safe from a crotch-grabbing old tea-lady. In order to seduce office secretary Cheryl, Pigeon invents a machine nicknamed Agnes which emits a 'sonic aphrodisiac' that can turn any man or woman into an over-lustful sex maniac. While his attempts to zap Cheryl end in disaster, Pigeon has some fun turning the 'sexy ray' on his bullying boss Nutbrown and clean-up campaigner Mary Watchtower.