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.

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.