In order to assassinate the inquisitive Belgian reporter Tintin, the evil gangster Al Capone orders Smiles, an executive under his command, to lure him to a meeting to be held in Chicago…
Tintin and his friends go to Syldavia and join a secret space program.
Tintin and his friends investigate when something ominous haunts seven archaeologists, just after their return from an ethnographic expedition to the Andes, where they have dug up the tomb of Inca Rascar Capac.