Three performers leave a sideshow after Tweedledee (Harry Earles), the midget, assaults a young heckler and sparks a melee. The three join together in an "unholy" plan to become wealthy. Prof. Echo, the ventriloquist, assumes the role of Mrs. O'Grady, a kindly old grandmother, who runs a pet shop, while Tweedledee plays her grandchild. Hercules (Victor McLaglen), the Strongman (strength athlete), works in the shop along with the unsuspecting Hector McDonald (Matt Moore (actor)). Echo's girlfriend, pickpocket Rosie O'Grady (Mae Busch), pretends to be his granddaughter.