At a college campus, two young girls are killed while strolling through a nearby forest. Suspicion falls on a chemistry professor and an intense and brooding music professor named Edwin Volck. Harold, a psychology professor, convinces his fiancee Daphne to act as bait to help trap the killer. The trap succeeds and Volck is revealed as the killer. Harold, however, becomes worried. He believes that the killers bloodlust may have inspired other less obvious psychos on campus. Daphne realizes that Harold has been speculating about himself when he suddenly attacks her. She is rescued by the chemistry professor. The chemistry professor had been watching Harold's behavior since the beginning believing that he was a possible psychopath.

Luis Aguilar is a rich wine merchant who disowns his son when he refuses to marry beautiful vineyard owner Kitty Norris. At a party, however, Luis agrees to give his destitute son $5000 if boy can drink him under the table. Drinking his own wine called "Joyful Woman" Luis humiliates his son by outdrinking him. After the contest, Luis hits on Kitty who resists and pushes him down the stairs. When Luis's secretary Ruth witnesses the event she jealously kills Luis in the hope that Kitty will be blamed. Ruth wanted Luis all for herself. Unfortunately for Ruth, a waiter discovers the body and figures out that Luis did not die in a fall. Ruth knocks him unconscious and puts his body into a wine vat. She begins to fill the vat slowly with water. Later the police find Luis's body and begin the search for the waiter who was also the son of George Felse, an investigating police officer. The police can't locate the waiter but discoverd a now guilt-ridden Ruth who has tried to commit suicide...

Lee Griffin is an actor who is reunited with his old girlfriend Diana at a London production of a play being financed by Diana's husband Charles Justin. Lee and Diana rekindle their old romance and hatch a plot to kill her husband who is a wealthy diamond merchant. Lee's first attempt to kill Charles fails, but he succeeds on his second try. On a trip to Paris, Lee assumes Charles's identity. Unfortunately, Charles was aware of Diana's unfaithfulness and murderer her before he was killed. He hid her body in a car which is being shipped to Paris. Customs officials find the body and Lee, who is posing as Charles, is arrested for the crime.

Cliff Allen is a television writer who is on way to Hollywood. On the way, he picks up a pretty hitchhiker named Rosie. As he is driving, Cliff is stopped by the police and Rosie accuses him of kidnapping her. Cliff denies everything, but the police make him go into town. On the way to town, Cliff's car breaks down and he is forced to stay over night in a run down hotel run by a washed-up vaudeville actor named Rudolph Bitzner who dreams of a comeback. At the motel, Cliff runs into Rosie who, not only works at the motel, but also is part of Rudolph's act. He apologizes for what she did and tells him that she only did it to get away from Rudolph who is planning to marry her. She tells Cliff that she still wants to leave and asks him to take her. He agrees and when his car is fixed he heads over to Rosie's. There he finds Rudolph who tells him that Rosie changed her mind. After cliff insists on hearing this from Rosie herself, Rudolph takes him to his rehearsal hall where Rosie sits wait

Peg is bored with her marriage to Ted Beal, a wealthy toy manufacturer. She decides to have an affair with his young assistant John. She tells her lover to kill her husband. When John drags his feet on the murders, she decides to take matter into her own hands. She commits her crime and discovers that she was only being toyed with.