Mrs. Graymalkin, who possesses some suspiciously witchlike talents, enlists the aid of Kerby and his dog Waldo to expose a crook among the town founders.
When three brothers, all extraordinary baseball players, move into the neighborhood, two rival teams play a game of hockey to determine which team will get them.
A mysterious potion mixed by Kerby with his chemistry set has a beneficial effect on the neighborhood bully but also wreaks havoc at the Sunday School pageant.