Once America's Jewel, Sewer City sits on the edge of her toilet seat as all citizens tremble in fear of the Sewer City Killer. This foul possibly eternal serial killer has taken to come up through the sewer pipes and murdering people as the sit in the toilet. The Citizens are fed up and Mayor Fred Tickle-burger is feeling the backlash. He hires a homeless plumber who goes only by the name Bum Plum to hunt the serial killer and destroy him. To make sure the bum doesn't lose his nerve he holds his hooker wife hostage. Who will win in the epic battle between circle saw and plunger?