Professor Echo is a sideshow ventriloquist who recruits two sociopathic co-workers, Midge and Hercules, the show’s midget and strong man respectively, into a burglary ring. Echo disguises himself as the elderly Mrs. O’Grady, the owner of a pet store, who sells talking parrots and mynah birds to a high-class clientèle with Hercules posing as his son-in-law married to Echo’s pick…