As a young boy, Jack saw his parents brutally murdered by monsters. Now he toils as a plumber, is saddled with an annoying girlfriend (Skarsten), attends therapy sessions that accomplish absolutely nothing, and is enrolled in night classes where he barely manages to stay awake.
But when his professor (Englund) accidentally unleashes an ancient curse and begins to transform into a hideous monster, Jack must put down his plunger, prepare to do battle with the forces of evil, and confront his destiny. All Jack wants to do is put his past behind him, but some things just won't stay buried...
Whether it's repairing a broken toilet or saving the world from unspeakable evil, it's a dirty job, but somebody's got to do it!