It's always Huck Finn and Tom Sawyer when there's real mischief afoot, with Old Man River in the background. Here the threat is a pair of smooth-tongued crooks who call themselves the Duke and the King. They pose as the uncles of a pair of pretty orphaned girls, guests of Aunt Sally. They plan to steal the girls' inheritance. They also threaten Jim and insist he's a runaway slave. Huck and Tom must take fast action—and they do! One int. set.