All of the boys have just graduated from school where they learned exterminating, except for Sach who flunked out. They set up their new business in a corner of Louie's Sweet Shop and quickly get a job to remove ghosts from an old abandoned mansion. Upon arrival they discover weird events taking place, such as lights turning on when a match is lit, and a disappearing organ. Soon they discover that these events are not the actions of ghosts, but of a mad scientist who is conducting illegal experiments in the basement.