Follow the investigations of a team of NYPD forensic scientists and police officers identified as "Crime Scene Investigators".

When a crop of doped-up athletes from the Lakecrest College swim team dive into the campus lake to blow off some steam, the bloodsucking leeches below the surface undergo a stunning transformation. After ingesting small amounts of the swimmers' steroid-laced blood, the slimy creatures grow to unusual sizes and set out to sink their teeth into an unsuspecting student population.

Five high school cheerleaders, their coach and a couple of adolescent sex-crazed guys travel to a cabin in the woods for a weekend getaway only to be killed off one by one by an unseen maniac.

Eighteen year-old Corey Peterson and his mother move to a small town due to a trauma in their past. On Corey's first day at Hallows End High School, he's approached by Mason, also new in town, who tells him about the death of his friend at the school and advises Corey to stay away from the wrestler Perry and his gang. When two other students vanish, Corey decides to talk to Principal Rizcheck, who pays no attention to him. Corey and Mason investigate the secret about the school and expose the dark truth about Hallows End and the missing students.

Two Arizona girls head out to the Malibu beaches for a springbreak of partying and fun in the sun.

At a Los Angeles strip club, provocative Narina is the undisputed star. But when Narina and her friend, Dee, are performing a daringly erotic routine, the lights go out and Dee is stabbed to death. All the evidence points to Narina, and Narina herself feels she may be guilty because of her own dark secret: she has killed before.

In a small town, a demonic form of the Easter Bunny murders everyone in its path. The residents realize that they must destroy the creature before it completes its 'Easter Holocaust' and brings about the apocalypse.