1827 – William Legrand, son of a fallen family, came to Sullivan Island, South Carolina, to flee the misery. Wandering on the island, he discovers a rare bug, made of gold. He uses a piece of paper to take it. At night, he draws the bug on this same piece of paper, as he is explaining the adventure to his friend Edgar, standing in front of the fireplace. As William takes back the paper, he realises that symbols appeared on it. It must be an invisible ink, revealed by the heat. From that moment, William thinks it is a Pirate’s document: Captain Kidd’s coded instructions to his hidden treasure… Help William find it!