In this animated musical adaptation of the original Mark Twain story, the characters are all from the animal kingdom. Young Tom Sawyer spends his days causing mischief, getting into trouble with Aunt Polly (Betty White) and embarking on adventures with his pals Huckleberry Finn and Becky Thatcher. But when Tom and Huck see a horrible crime committed by a villainous bandit, they must struggle to clear the name of innocent Mutt Potter (Don Knotts), who has been wrongly accused of the deed.