Tintin, with the help of his dog Milú, Captain Haddock and a group of children, tries to find the whereabouts of professor Tornasol and a Spanish colleague, who have been kidnapped in Spain after finding a solution to world hunger.

In this live-action adaptation of the comic, Professor Calculus has just written a book called "The Earth is Starving". He appears on television to appeal to the scientists of the world to work towards a solution to the hunger problem. Soon afterwards, he receives a package from a Spanish professor, Antenor Zalamea, which contains a blue orange that can be grown in desert soil. Calculus travels to Spain, but a criminal emir who wants the discovery for himself kidnaps both professors. Tintin and Captain Haddock come to the rescue with the help of some local children.—Jonathan D. H. Parshall <[email protected]>