Professor Calculus' dreams of ending world hunger are brought one step closer by the creation of a desert-proof orange, deep blue in colour. But it seems he's not the only one interested in this magnificent scientific discovery. When the strange blue orange - invented by Spanish Professor Zalamea - is stolen, Tintin, Captain Haddock, Calculus and Snowy the dog make for Spain to investigate. In a riotous adventure - which boasts the involvement of Asterix co-creator Rene Goscinny - Tintin and friends must overcome violent kidnappers, deadly traps and unscrupulous rich adventurers to rescue the orange and themselves. Help comes in the unlikely form of a gang of enterprising kids and big-hearten opera menace Bianca Castafiore.