In a small town in Lazio every year a procession is held in honor of San Giovanni, to ask forgiveness for the sins committed, recalling an ancient legend.
A baleful limping man walks through Prague. He is Asmodeus (Juraj Herz), the fiend of lustfulness, entertaining himself by putting together by magic couples of lovers.
Sam Moran is a Honolulu charter-boat captain who leads fishing expeditions in the tropical paradise. When his daughter is found murdered at the party of a wealthy young playboy, he seeks the truth about the murder.