After their previous adventures on Jackson Island, Tom and Huck go on another adventure? What do they do? How does their game get out of hand? What do the boys do?

Tom and Huck go looking for buried treasure. After spending their time digging and finding nothing, they decide to dig at the haunted house. Their game gets out of hand when they discover Injun Joe is hiding out at the house, and they hear him planning his revenge.... against Tom.