An elderly heiress is killed by her husband who wants control of her fortunes. What ensues is an all-out murder spree as relatives and friends attempt to reduce the inheritance playing field, complicated by some teenagers who decide to camp out in a dilapidated building on the estate.
After several Catholic school pupils are murdered, a teacher who is having an affair with one of his students becomes a suspect. When other gruesome murders start occurring shortly thereafter, the teacher suspects that he may be the cause of them.
A San Francisco doctor encounters a prostitute who bears a striking resemblance to his late wife.
A mute woman, traumatized by her parents' death, faces new horrors when her cousin is murdered by a suspected killer. As danger looms, the truth proves far more complex.
A wealthy playboy gathers a group of bourgeois friends at his isolated beach house for a weekend of relaxation. When bodies start pilling up, they realize they’re trapped with a killer in their midst, sending them in a frenzy to figure out who amongst them is killing the others before they are killed next.
After her husband dies in a freak plane accident, a woman leaves London for Athens to collect his generous life insurance policy. She soon discovers that others besides herself are keen to get their hands on the money - and are willing to kill for it. Meanwhile, a private investigator arrives to investigate irregularities in the claim, teaming up with a beautiful reporter.
A detective gets hired to go mediate with an alien that has taken refuge at a hotel in northen Italy.
A cop suspects his wife's infidelity, only to become the prime suspect when she's murdered. A criminal psychologist believes the real killer is a presumed-dead serial killer, as more murders unfold.
A newsman works with a blind puzzle-solver to uncover a deadly conspiracy linked to a genetic research facility.
An American writer living in Rome witnesses an attempted murder that is connected to an ongoing killing spree in the city and conducts his own investigation, despite him and his girlfriend being targeted by the killer.
In the summer of 1979, gay porn producer Anne sets out to film her most ambitious film yet, but her actors are picked off, one by one, by a mysterious killer.
In Miami, Florida, biker gang leader Edward "Diablo" Santer is about to be executed for murder when he proclaims his innocence and vows revenge from the grave. When a mysterious biker comes to town during Spring Break festivities, leaving several teenagers electrocuted to death, some begin to suspect that Santer has made good on his promise.
After a phone call has been intercepted (an industrialist is going to receive a huge amount of money from a foreign bank), Mafioso Luca Albanese is assigned to set up a big robbery. He and his gang (three men and three women) then hide-out in a remote mountainous region, but soon at each other's throats. Moreover, someone is killing Albanese's men one by one, leaving white paint on the victim's faces...
Smeralda Amadier, a retired singer, lives in an isolated villa with her secretary Marcella and her lover Didier (but throws out the latter after catching him with another woman). Smeralda has huge debts and when creditors threaten her with bankruptcy she decides to sell her valuable jewels. That evening, she meets Costas, a handsome young man who seduces her. Next morning, there is no sign of him or the jewels. He was apparently a penniless gigolo, but who was his secret partner in the theft?
Andrea, the only son of a rich publisher, is a neurotic young man obsessed by his mother. He is dominated by uncontrollable impulses and suicidal fantasies, while his regressive behaviour makes him lonely and frustrated. Incapable of having normal sexual relationships, he spies on his stepmother's adulterous affairs and is obsessed by Carol, a young American girl he secretly films (even when she's making love with her boyfriend), and whom he clumsily courts. Finally, Andrea wins Carol over but is still tormented by the fear of losing his own private world of memories and macabre games...
A lonely housewife hears a man’s footsteps in the apartment above her late at night. The upstairs neighbor insists it is her husband who has returned from business but her explanations are soon contradicted. The woman begins to think her neighbor has murdered her husband.
Against the wishes of her Aunt Valeria, attractive Milena travels to Milan in order to secretly marry Marco Giraldi. Three years later, Milena returns to her hometown Fermo, where her husband's shoe business is in financial difficulties. Shortly afterwards, she is abducted, a valuable painting is stolen and Aunt Valeriais murdered. Two young villains, who carried out the dirty work, are then killed...
Italy, the early 19th century. A villa is the home of a small English community, all rich and superficial people lounging about in its beautiful surroundings. Claire, George's wife, and Robert, her son, are murdered by a mysterious killer. Thinking the murderer is one of the family, distraught George devises a plan to unmask the culprit. Having met a woman, Ann, who is a dead ringer for Claire, he takes her back to the villa and announces their imminent marriage. Ann is considered an outsider and treated with contempt and hostility, while George fails to find any significant clue to the solution: everybody is to be blamed, at least morally, but the final revelation is more bitter than expected...
Fabrizio, a fashion photographer, Maregalit, a nympho model; Anna, Fabrizio's wife and Valeria, her sister, land on deserted islet for a photo-shoot. When Fabrizio temporarily leaves the women alone to buy some fuel for their yacht, a young man, Marco, joins the trio.
Katharine Milford commits suicide by jumping out the window. Her brother, Richard refuses to believe the police story about suicide, and when it is discovered that more people had contact with Katharine died in the same way he starts a private investigation, which leads the man into Londons 'dirtiest hippie clubs. It seems that music is the common factor in all suicide - or was it murder?