Ben and Mark stumble upon fish poachers and their illegal smokehouse. The men threaten to kill Ben if Mark tells his father. Later Ben wanders off and Mark follows him onto the poachers' boat; they hide but the boat takes off when they hear Tom's airboat approaching. When they start shooting at Tom, Mark and Ben come to his rescue and the poachers are arrested.

A group of Seminole children approach Mark for help in attending his school, having been impressed by him getting Jimmie Boy into the school in the earlier episode ""The Invasion of Willie Sam Gopher"". Their main drawback is that they live on islands and don't have a boat to get them to school. Mark offers the winnings of the air boat race his father is in the next day to buy the boat. On the way to the race, Ellen tips the jeep and is trapped. Mark uses Ben to get the jeep off of her leg but she still can't move because it's broken. Mark contacts his father on the radio- he has just won the race and comes to help. At the victory celebration Tom gives the check to the Seminole kids to buy a boat and Mark gives Tom's winner's medal to Ben, who was the real hero of the day.