Slip, Bobby, Whitey and Chuck all graduate from Insect Exterminators College, but Dean Pettyboff flunks Sach. They set up business in Louie's Sweet Shop owned by Louie. Their friend Gabe returns from overseas with his French-bride Mignon and they follow the boys to the scene of their first exterminator job -- a supposedly haunted house. Mignon is kidnapped by Ivan, who, with Mrs. Grimm, also holds Dr. Bender prisoner in a secret room for mad Dr. Coslow. Coslow has his henchmen Ivan and Stiles grab Sach, with plans to transplant his brain into a gorilla.
—Les Adams <longhorn1939@suddenlink.net>