We are in 50 B.C.; all Gaul is occupied by the Romans... All? No! For a village populated by irreducible Gauls still resists and always resists the invader. And life is not easy for the garrisons of Roman legionaries of the cut camps of Babaorum, Aquarium, Laudanum and Petibonum... After an argument, Cleopatra bets with Caesar that the Egyptian people are still capable of great achievements. In a very short period of time, she entrusts the architect to build a sumptuous palace for Caesar. Alas, Numis is not a very skilled architect, and he risks feeding the crocodiles if he does not fulfill his mission in time! That's why he goes to Armorica to ask for the help of Panoramix, Asterix and Obelix...