After discovering an aged map with a big bold X marking a special spot, Josh is eager to unravel the mystery of Blackbeard's treasure. The X lies on an island neighbouring St Lucia, in the Caribbean, where his dad has organised a holiday to show Josh his homeland. Josh jumps at the chance to sneak off to Skull Island, eager to get his hands on the gold!

Will Josh's map be a booby trap? Or will X mark the spot and hit gold?