A rich actress who has gotten too old for leading roles employs a scientist who is working on a formula for eternal youth. The formula involves withdrawing certain fluids from the human brain. She takes the serum, but its unforeseen side effects turn her into a murderous monster.

A British couple on a break on a small Greek Island spreads terror beyond anything the Islanders could ever have imagined, only stopping every once in a while to shag anything that moves, be it man, woman or animal. But will they go unpunished, or will the inspector from London be able to put an end to their killing spree?