Chip, Sudsy and the other boy cub scouts are downhearted when it seems imminent that Mrs. Thorndyke their den mother is leaving for Washington state. In need of a new den mother Chip volunteers his Grandfather or else they will have to disband until a substitute can be found.

The members of Robbie's high school wrestling team need higher grades to remain eligible, so they choose Steve as their tutor. Soon the house is quarantined for Diptheria, and when Bub doesn't get his long-awaited rendezvous with "Old Roy," the biggest catch in the lake, watch out boys.