Based on François Bourgeon's French comic book series from the '80s, the game follows the series' plot very closely.

As the French Revolution is about to begin, Hoel and Isa find themselves in Brittany after a series of unfortunate events. They will face a thousand dangers, travel from the European to the African shores, in a quest to discover truth about Isa's real identity.

The player controls, in turn, the actions of the daring heroine, the courageous and loving sailor, and more than fifteen other characters living towards the end of the eighteenth century.