 Mr.Slate invites Fred to his private yacht, but at the condition that he paints it. While asleep on the ship, the moorings get loose and the yacht drifts away. Fred wakes up and discovers the yacht touches a deserted island. Fred declares this uncharted island his land. With Barney, he meets a native called Saturday. However, a fake volcano erupts, as Fred s discover he s in an amusement park, and one of the patrons of the Island adventure is Mr.Slate... However, the "somewhat fake volcano" begins to erupt without control !