Following the attack of the Viking village by the Berserkers and the abduction of Aaricia, Thorgal, Sigurd, Ratatosk and other Viking companions took the sea. On the boat of the Bersekers, a fight is waged between their leader, Moldi-le-Furieux and Runa, the mercenary Skjaldmö whom he had hired to help them loot the Vikings. In parallel, Gandalf-le-Fou, despite his status as king of the North Vikings ridiculously lost to the game, does not let himself be killed and tries to neutralise Hierulf-le-Penseur, guarantor of respect for Viking justice. All this small world will find itself in a final confrontation whose victors will not necessarily be the strongest, but especially the most cunning!