With the intent to wipe out the Gaulish village by any means necessary, Caesar concocts a plan to absorb the villagers into Roman culture by having an estate built next to the village to start a new Roman colony. The colony is to be called the Mansions of the Gods. The project is led by the architect, who begins by getting an army of slaves of various races and countries to pull down the trees in the forest. With the help of Getafix's magic, Asterix and Obelix sabotage the plan by planting instant-growth trees, magically enhanced by one of druid Getafix's potions, thus repairing the damage.