Tintin intrepid reporter, and his loyal dog, Snowy, are thrust into an environment of experience once they discover that a ship carrying an explosive secret. As Tintin is drawn into a puzzle that is centuries-old, Ivan Ivanovitch Sakharine supposes him. Tintin and Snowy, with the assistance of sour, cantankerous Captain Haddock and bumbling detectives, Thompson and Thomson, travel half the entire world, 1 step ahead of their opponents, as Tintin endeavors to obtain the Unicorn, a submerged boat that will possibly hold a vast fortune, but also an ancient curse.