A popular beauty surprisingly asks a nerd to take her to the prom. He wakes up hours later in a sleazy alley. She's missing but he remembers nothing about it.

In Greeley County, Colorado, the former Sheriff Ben Sloane is an efficient tracker that lives in an isolated cabin in the middle of the woods. After rescuing a young woman that has been abducted, Ben meets Sheriff Darryl Carter tells to him that his estranged son Nick is the prime suspect of killing his co-worker Raymond "Ray" Correlli. Ben heads to Chicago to meet the unfriendly Detective Susan Kincaid that does not help him. Soon Ben learns that Nick is married with Maggie and has a baby son; he worked in the Stetski Brothers Constructor and studied architecture at college. Ben also meets Nick's friend Danny Smalls that tells to him that his job was indicated by his professor Hoffman. Ben goes to the crime scene and finds that Nick did not kill Ray and the crime scene was modified and he suspects that the construction company is hiding something. Will Ben be capable to find tracks to prove the innocence of his son?

The residents of a suburban high-rise apartment building are being infected by a strain of parasites that turn them into mindless, sex-crazed fiends out to infect others by the slightest sexual contact.

A private eye shadows a female serial killer of men all over the U.S. without her knowing as he, strangely enough, occasionally acts as her guardian angel.

Two men have already been killed during intercourse by a prostitute. The young Sergeant Peckham is transferred from vice to homicide squad for the investigation.