While trying to cure Obelix, who has reverted to childhood after drinking a potion, Asterix and the druid Getafix join a band of escaped Roman slaves led by Spartakis, and soon make their way to Atlantis, where they meet Absolutlifabulos.
The slaves are revolting... they've stolen Julius Casar's own galley. Seeking shelter in the little Gaulish village, they find it in crisis. Obelix has suffered diree effects from drinking the druid's magic potions on the sly. Can his friends get him cured by Absolutlifabulos, high priest of Atlantis? Enjoy all the thrills and spills of sea battles against the Roman navy!
In ancient Rome, the slaves are rebellingand they’ve even stolen Julius Caesar’s own warship, the finest in the Roman navy. Under the heroic leadership of Spartakis, the former galley slaves make for the small town where Caesar’s old enemies Asterix and Obelix live. Now everyone must sail to the wonderful continent of Atlantis. But, the Romans are on the ocean blue, too...and the battles are about to come fast and furiously.