In the year 50 BC, Gaul is occupied by the Romans - nearly. But the small village of Asterix and his friends still resists the Roman legions with the aid of their druid's magic potion, which gives superhuman strength. Learning of this potion, a Roman centurion kidnaps the druid to get the secret formula out of him.

Sergeant Cruchot and his faithful comrades have been sent to the International Congress of Gendarmerie in N.Y.