A satanic cult led by Baron Corofax (Peter Cushing) kidnaps three young people and Father Roche (Donald Pleasence) & Milo (Costa Skouras/Kostas Karagiorgis) must save them from the hands of this evil.

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?