To be a good detective is one thing, but to be a nursemaid to a young and strange baby is something else again! Si and Elmer have done very well as Punkenville's correspondence school detectives, and have solved a case or two in very good style, but now they have an entirely different kind of problem... Just as the old boys were leaving their rooms at the widow Snodgrass' boarding house, they found a clothes basket on the front porch. On the top of the clothes was a little stray puppy dog and in the basket was a baby - a real live baby...