An insurance salesman inadvertently gets trapped after dark in an apartment building that is terrorized by a street gang called "The Vampires."

Mick O'Brien is a young Chicago street thug torn between a life of petty crime and the love of his girlfriend. But when the heist of a local drug dealer goes tragically wrong Mick is sentenced to a brutal juvenile prison where violence is a rite of passage and respect is measured in vengeance.

After witnessing a mysterious woman brutally slay a homemaker, prostitute Liz Blake finds herself trapped in a dangerous situation. While the police thinks she is the murderer, the real killer is intent on silencing her only witness.