On the shores of a deserted island, a band of pirates anchors with the intention of digging up a legendary treasure of gold. In their expedition, however, they have made the bill without hooded murderous monks, who populate the island in droves, all intruders, which they get hold of, cruelly slaughter and even eat from the flesh of their enemies. A randomly passing blonde and her conditionally defensive bodyguard round out the well-groomed chaos.

Strange things are going on in the sleepy little town of Stadtlohn. A doctor at the local hospital is experimenting with his patients to turn them into will-less "exhibitionist killers". Unfortunately, the first leather coat creature manages to escape to his family. But strangely enough, the exposure results in his immediate death. The sister of the noodle wielder is not at all pleased about this and wants to inform the police about the mad doctor. In the meantime, he has created a whole army of perverted murderers and sends them out to destroy the witnesses. A bloody butchery marathon takes its course.

A deranged violent criminal makes the area unsafe. In his sick brain he goes through a total psychosis and thinks that all beautiful girls are butterflies. After escaping from the inner city again, he sets out to kill all the butterflies. The lunatic's father is an influential millionaire and desperately tries to protect his son from the police and co. There are masses of conflicts and liters of "blood".

At a wedding, the pregnant bride has a premature birth. Many years later there is a bloody series of murders, because the child of that time, now physically and mentally damaged by terrible abuse, begins a cruel vendetta. The "slaughter of the devil" begins.