Archaeologists from the Sanders-Hardmuth expedition returned to Europe after two years in Peru and Bolivia, where they have found the tomb of King Scratch Inca Capac. Will soon begin to suffer from a strange disease that plunges into a deep slumber, awakening all at the same time of day, terribly shocked, as if tortured to fall back into his dream. All indications are that concerned the prophesied punishment in the grave itself Scratch Capac. Along with all the sick are the remains of a spherical glass balls some poison in it.
Tintin, Captain Haddock and Professor Calculus visit one of the members of the expedition: Prof. Hipólito Bergamotte. When he falls ill and Professor Calculus is kidnapped, Tintin and Captain keep track of your friend who will take them to Peru.