Thought to be killed by the sole survivor of the last Crystal Lake Massacre, Jason kills his way back to the lake to once again murder its inhabitants. This time, has Jason met his match in the little boy Tommy?
Lawyer Rick Magruder has a one-night-stand affair with caterer Mallory Doss. He becomes hooked on her, and when he learns her nut-case father Dixon is threatening her, he puts the weight of his law firm behind Mallory, has Dixon arrested and subpoenas her ex-husband Pete to testify against Dixon in court. Dixon is sent to an asylum, but escapes from there and the lives of many people are in danger.
Something disturbing is going on in San Francisco each and every night. Certain locals who are out at night, are being set upon and slain, by someone or something, to be found in the morning mutilated or parts missing. Ocassionally they are never found at all ditto the parts that go missing. Tonight one teen is going to witness a massacre at the hands of this lethal mystery. And might be able to shed some light over it to the cops. That is if she survives the night.