A writer arrives to an isolated guesthouse run by a beautiful but strange woman, then a series of killings starts.

Period piece set during the Inquisition about a witch-finder general who falls in love with the village beauty, who has made a pact with the devil to seduce and condemn the man who is killing off Satan's servants.

It was clearly also influenced by American "Dirty Harry" movies and perhaps the cynical Italian police thrillers that were emerging at the time. Naschy, this time,plays a hard-boiled cop who slaps around elderly exhibitionists and makes a wounded biker with a broken leg crawl to the hospital. He is up against "the Dragonfly Killer", a vigilante who is offing pimps, prostitutes, and junkies--"cleaning up the city" much like the villains in the Dirty Harry sequel "Magnum Force" (although his motive for doing so would have made Harry Callahan crap his pants in utter disbelief). Erica Blanc plays Naschy's fashion designer wife who, after one of her gay friends is killed, decides to try to solve the case herself using her "woman's intuition". This leads to comical scenes of her sitting naked in bed pouring over grisly crime photos with a magnifying glass, or acting hysterically (albeit much more believably)when the killer sends the severed head of a Turkish pimp to their house.Of course, she stumbles across the identity of the killer before her husband does, leaving Naschy to rush to her rescue.

Enrique Tolosa is a boss administrator of a small company which employs 50 workers. There never has gotten into politics, has made ​​himself stood professionally and created a family and no one has asked opinion on how would be the destiny of their country. The story begins whenheI first asked to give their vote at the polls for the election of political parties. With the decision to vote is faced with doubt and decides to investigate on their own to know which political trends that are managed as possible, is the one he goes to his temperament.

Marta is obsessed with protecting her son from the genetic predisposition to schizophrenia that she has hidden from her husband.

La I.I.S.S. (International Investigation Spanish Section) es una agencia clandestina de detectives, especializada en "infidelidades matrimoniales". Julio, el creador de la agencia, utiliza las técnicas más avanzadas. Su ayudante Timoteo se dedica a la investigación en el tiempo libre que le deja su profesión de bombero y, por supuesto, robándole horas al sueño, por lo que se suele quedar dormido en los momentos más inoportunos.