Julius Caesar, fed up with being humiliated by the indomitable Gauls, decides to have Getafix kidnapped. The Romans take him to the ends of the earth so that he can fall into a void, but by catapulting him, the Druid lands in America and is taken in by a tribe of Indians. Asterix and Obelix, having witnessed their friend's abduction, have followed the kidnappers' plight and have also landed in these mysterious lands, the existence of which nobody knew.