Five On A Treasure Island begins when the children and Timmy are on their way to Kirrin Island. While on their way there, they encounter a shipwreck and George explains to the others that her great-great-great-grandfather was on that ship, and that there was a lot of gold in it. The ship was destroyed during a storm. George then explains how divers never found the treasure despite repeated attempts.The children agree that the treasure must have been hidden away in the island, and so they begin their search. While chasing a rabbit into a hole, Timmy gives the five a clue to the treasure. In the now accessible shipwreck they discover a box that looks more like a treasure box. Inside the box lies the map to the treasure, and the five enter the dungeons to explore and search for it.
