1691 . . . Nick Pearson swings back into action with the crew of the Tetrarch on an adventure to find treasure on an island in the Caribbean. But the treasure takes more forms than just silver and gold, for Nick's old sweetheart Sarah has recovered from her long illness and has set off to find him. Meanwhile other treasure hunters are in hot pursuit. Fuming with anger after being outfoxed by the pirates and losing his treasure to them, Don Diego unwittingly seeks the same hoard. He has learned about it from a beautiful French woman who has joined forces with the Lady Evernia, who wants her share. At the same time, a band of buccaneers has learned of the island, and they have their sights set on the riches. Into this mix comes a boy destined to become one of the most famous pirates in history. All of these groups hurtle toward collision with a mysterious Marquis who will not give up his wealth lightly in this classic-style pirate treasure hunt.