He was once a normal happy child, but drunken abuse from his father sends John Wayne Gacy down a sinister path; the urges inside him can't be contained, leading to the beginnings of his crawl-space burial ground.

John Wayne Gacy continues to cruise for victims on the streets of Chicago; he brings them home, then tortures, and kills them; his wife and many others suspect he's up to no good, but no one realizes the depths of his depravity.

Jeffery Rignall, one of John Wayne Gacy's victims, survives and tracks him down; Rignall tries to bring Gacy to justice, but the killer's polished public persona fools everyone.

When the police search John Wayne Gacy's house, they discover a hole under the house that is accessed through a hatch.