The Treasure Island.Leon finds a map to the treasure of the famed pirate Captain Renolds and proposes to his friends that they search for it, Franco suggests they recruit Pinocchio to dive for the treasure (and leave the puppet stranded after he's found it) as he doesn't need to breathe. The three boys find Pinocchio going to school with Anna, who tries to dissuade him from going as the area is said to be cursed and guarded by a sea monster, but he quickly agrees to go after being promised a share of the treasure, which he plans to surprise his father with and the four boys head off on Leon's homemade raft. However Anna is still worried about them, especially after the weather begins to worsen, and she tells the adults what happened; unfortunately the hostile weather prevents the search party from departing and the worried parents blame Pinocchio for dragging his classmates into the treasure hunt, even when Anna explains that the opposite is true. Meanwhile the boys have survived the storm, though they've lost their sail and their supplies have been ruined by saltwater, Franco convinces Pinocchio to go into the water to help catch one of the small sharks swimming near their boat by knocking it out when it tries to bite him. Afterwards they send him to search for the treasure which he eventually finds in a sunken ship, however the shipwreck is soon attacked by the sea monster, a giant catfish that eats Pinocchio when he tries to return to the surface, fortunately the puppet finds a sword inside the treasure chest and begins trying to cut his way out of the monster. Meanwhile the parents have found the other boys and brought them aboard the rescue ship but refuse Geppetto's requests to stay and look for Pinocchio, as they prepare to leave the sea monster begins attacking the ship, however before the monster can attack Pinoccho finds and stabs the creature's heart before cutting his way out of the fish. Once Pinocchio and the treasure are on board Geppetto scolds his son for making him worry, but is touched that he wanted to surprise him with the treasure. Pinocchio then shows everyone what else was inside the chest: the skeleton of Captain Renolds (though Pinocchio thinks it's a marionette); the ship's crew is impressed that he not only killed the sea monster and removed the curse from the island but found the remains of the pirate captain, which makes the parents feel guilty over their own behaviour, and everyone returns home.