Cleopatra bets Julius Caesar that she will be able to build a new palace for him in three months. Cleopatra forces the architect Numerobis to build a palace covered in gold within the ridiculous time frame, threatening to feed him to the crocodiles if he fails. Numerobis seeks help from his old friend, the Druid Panoramix from Gaul who brews a magical potion that gives superhuman strength to anyone who drinks it. The druid agrees to help, but brings Asterix and Obelix with him to Egypt. When Julius Caesar hears that the project may succeed, he has his troops attack the building site.