Convinced that Captain Haddock’s ancestor, Sir Francis Haddock, used a series of clever clues to describe the precise location of a priceless treasure, Tintin, Snowy and Captain Haddock rent a boat — the Sirius — and set sail on a treasure hunt. Without knowing it at first, the team is accompanied by an eccentric scientist called Professor Calculus. Although it is difficult to hold a meaningful conversation with the professor due to his hearing problems, Calculus more than proves his worth as an extra passenger. His ingenious mini-submarine certainly comes in very handy when searching for shipwrecks!