Stark naked man comes out from the sea and begins to walk the streets, interfering in daily episodes, always in search of justice. He names himself Finis Hominis (The End of Man, in latin), and soon becomes sort of a modern Messiah, capable of performing miracles. An adulterous woman and a cheated husband are among his most faithful followers, as well as a group of hippies.
Psychiatrist experiments LSD on 4 volunteers, to investigate Coffin Joe's influence over them. Each patient presents a different reaction, involving sex, perversion and sadism.
