Tintin, the famous journalist, is tasked with finding the legendary Golden Fleece. Along the way, he encounters treacherous mountains, a stolen treasure, and a coup d'etat in a fictional country. With the help of his faithful dog Snowy, Tintin must navigate through dangerous situations to uncover the truth.

When Tintin and Captain Haddock travel to Spain, they find themselves embroiled in a mad scientist's plot involving genetic engineering and a mysterious blue fruit.