The Adventures of Tintin

In 1940s Brussels, young journalist Tintin browses an outdoor market with his pet dog Snowy and purchases a model of a ship known as the Unicorn. He is then accosted by an Interpol officer named Barnaby and a ship collector named Ivan Ivanovitch Sakharine, who both unsuccessfully attempt to purchase the model from Tintin. After Tintin takes the model home to his apartment, it gets accidentally broken during a chase between Snowy and a cat. A parchment scroll then slips out and rolls under a piece of furniture. Meanwhile, bumbling police detectives Thomson and Thompson are on the trail of a kleptomaniac pickpocket named Aristides Silk.
After visiting Maritime Library to uncover the history surrounding the Unicorn, Tintin returns to find the Unicorn had been stolen. Suspecting Sakharine, he heads to Marlinspike Hall and accuses him of the theft, but noticing Sakharine's model is not broken he realizes there are two Unicorn models. Tintin then returns home to his apartment to find it ransacked. Snowy shows him a scroll that had rolled under a chest of drawers when the ship was knocked to the floor. Soon after, they are interrupted by the arrival of Interpol Barnaby, who is then assassinated while attempting to recover the Unicorn. Tintin places the scroll in his wallet, but is pickpocketed by Silk the next morning.
Later, Tintin is abducted and imprisoned by accomplices of Sakharine on the SS Karaboudjan. He learns that Sakharine formed an alliance with the ship's staff and led a mutiny to take control. On board, Tintin meets Archibald Haddock, the ship's captain who is permanently drunk and unaware of most of his past. Tintin, Haddock and Snowy eventually outrun the crew, escape from the Karaboudjan in a lifeboat, and attempt to use a second one to fake their deaths, but Sakharine sees through the ruse and sends a seaplane to find and capture them. Feeling cold and thirsty on the lifeboat ride, Haddock foolishly uses a stowaway bottle of whisky to light a fire in the boat, accidentally causing a massive explosion that flips the boat upside down and leaves the trio stranded on top of it. The trio seizes the plane, and uses it to fly towards the fictitious Moroccan port of Bagghar. However, the seaplane crashes in a desert due to low fuel and a thunderstorm.
While trekking through the desert, Haddock hallucinates and remembers his ancestor, Sir Francis Haddock, the 17th-century captain of the Unicorn whose treasure-laden ship was attacked by the crew of a pirate ship, led by their leader Red Rackham, later revealed to be Sakharine's ancestor. Sir Francis surrenders and eventually destroys the Unicorn and most of the treasure, to prevent it from falling into Rackham's hands before sinking. The story implies there were three Unicorn models, each containing a scroll; together, the scrolls can reveal coordinates of the location of the sunken Unicorn and its treasure. The group is eventually found and rescued by French soldiers and they make their way to Bagghar.
Thomson and Thompson arrive in Bagghar and give Tintin back his wallet and the first scroll, having apprehended Silk. The third model and scroll is possessed by Omar ben Salaad, which Sakharine steals during a Bianca Castafiore concert. A chase through the city ensues during which Sakharine gains all the scrolls. Just as he is ready to give up, Tintin is persuaded by Haddock to continue. With help from Thomson and Thompson, Tintin and Haddock track Sakharine back to Brussels and set up a trap, but Sakharine resists. When his men fail to save him, Sakharine challenges Haddock to a sword fight with the cranes at the dock. Sakharine threatens to torch the scrolls after Haddock corners him, but Tintin snatches them from him. After the fight, Sakharine is pushed by Haddock overboard and is then arrested by Thomson and Thompson.
Tintin, Haddock and Snowy are guided by the three scrolls back to Marlinspike Hall, revealed to be the Haddock family estate. In the cellar, Haddock notes a globe with an island he knows does not exist and presses it, causing the globe to open and reveal some of the treasure that Sir Francis had managed to recover along with his hat and a clue to the Unicorn's location. The film ends with both men agreeing to set up an expedition to find the shipwreck and the rest of the treasure.