When the Beavers win a trip to Branson, MO, they get their little sisters to come over and check on the dam. But instructions develops a severe glitch, and the little girls wind up doing all sorts of crazy things to the dam. Everyone, especially Norb, is relieved when Dag decides to mimic his comic book hero Muscular Beaver and go into disillusioned retirement. His retirement is short-lived when he discovers that all along Norb has secretly enjoyed dressing up as his nemesis Baron Bad Beaver.