Mighty Angelo is billed as "The World's Strongest Flea" by the urban circus at which he performs. Angelo decides to take a vacation on some quiet, country dog and hops into the fur of a shaggy pooch sleeping on a suburban estate. When a belligerent bulldog disturbs the pooch's- and Angelo's- sleep, Angelo decides to fight the bulldog. The bulldog is befuddled by the unseen powerhouse that drops bricks on his head, pulls him through a knothole in a fence, and whacks him on his head and backside with a mallet.