The teenage reporter joins his friend Captain Haddock on a voyage to Istanbul, where the drunken mariner has inherited a ramshackle boat. However, when assassins try to kill them, they realise the vessel may be the key to uncovering a lost treasure stolen during a coup in Latin America. Comic-book adventure, starring Jean-Pierre Talbot and Georges Wilson. Dubbed in English.

After the death of Captain Thémistocle Paparanic, Captain Haddock's old friend, he inherits a ship called the Golden Fleece. Once Tintin and the captain arrive in Istanbul, where the ship is anchored, they meet Mr. Karabine, a businessman who stubbornly insists on buying it even though it is in a dilapidated state.