 To avoid his mother-in-law being a helper for the house, Fred tries out many maids with little success. However, on a ride on town, a somewhat innocent old maid proposes to Fred to be their in-house maid. However, little he knows that this lady is a criminal called "Grandma Dynamite" who steals banks with dynamite sticks. And he learns it the hard way when he goes on an errant with her and her hunky grandson...