A serial killer mutates with a chemical inside a sewer, to become a monster made of human waste just as the FBI and police are onto him.

Escaped serial killer Jack Schmidt is on the run from the police and FBI after escaping from jail. They corner him and gun him down in a sewer tunnel, where he falls into a pool of chemicals dumped by the company who created it, Dutech. The combination of feces and this chemical transforms him into a half human, half feces creature, who goes on a killing rampage. And it's up to a group of local law enforcers to stop him.