Two police detectives are assigned to investigate the murders of several young women at a health club.

Dave Bannion is an upright but unscrupulous cop on the trail of a vicious gang he suspects holds power over the police force. Bannion is tipped off after a colleague's suicide and his fellow officers' suspicious silence lead him to believe that they are on the gangsters' payroll. When a bomb meant for him kills his wife instead, Bannion becomes a furious force of vengeance and justice, aided along the way by the gangster's spurned girlfriend Debbie. As Bannion and Debbie fall further and further into the Gangland's insidious and brutal trap, they must use any means necessary (including murder) to get to the truth.

Six years ago Jack "The Ripper" Stemmons, an American boxer had his career destroyed by a St. Louis bookie. After Jack seeks revenge he is forced into hiding. Jack disappears half way around the world in Thailand. There he falls victim to the addictive spell of Bangkok's exotic and dangerous underworld. Eventually he finds solace in the arms of a beautiful prostitute who has been set in his path by a Russian gangster in order to get Jack back in the ring, This time in Bangkok's notorious underground fight clubs. No matter how hard Jack tries to distance himself from his past, it always hunts him down like a Bad Penny. When a mysterious fight fan appears, it's only a matter of time before Jack's past, present and future accelerate and collide into a twisted climax.

Ben and Sandra are hot and provocative lovers, but Sandra is unfortunately married to Ben's younger brother Jake, and soon Jake will find out about Ben.

Paul Decker murders his wife in her Italian villa by drugging her milk and asphyxiating her by gas. He cleverly locks the bedroom from the inside and hides inside a trapdoor in the floor until after the body is discovered by servants. He uses a scuba snorkel connected to tubes on the outside to breathe during the ordeal. Decker's stepdaughter Candy suspects him immediately, especially since no suicide note was found. She also is convinced that he murdered her father years before, but her accusations fall on deaf ears. The ruthless Decker even poisons the family spaniel when the pet takes too great an interest in the mask and realizes he will ultimately have to get rid of Candy too.

Kerwin Matthews, playing a dissolute drifter down on his luck, is stranded in a cheap bar in France where he falls for Annette, the pretty daughter of the proprietor, played by Nadia Gray. Nadia Gray gradually shifts the young man's attentions to herself, rather than her daughter, and together Matthews and Gray concoct a plot to help Gray's estranged husband, now a homicidal maniac confined in an institution after a grisly series of killings dubbed "The Acetylene Murders" by the press, out of the mental institution so he can escape from the country.

High-strung race car driver Alan Colby is trying to recover from a serious head injury. Alan and his lovely new wife Denise go on vacation to the South of France for some much needed rest and relaxation. But Alan is having trouble resisting his more violent impulses. Suave local psychiatrist David Prade offers to help Alan out.