The nephew of the leader of the Gallic tribe, Prostopnix, was sent by his caring uncle to two inseparable friends, so that they would make a true man and a fearless warrior out of a modest boy. However, such a "transformation" requires the desire of a guy that he does not have! The young man turned out to be a real weakling, completely unwilling to change his own existence. 

Meanwhile, the belligerent, aggressively minded Vikings, meeting no resistance on their way, plunder European settlements with impunity. Uninvited guests from Scandinavia are in search of fear, which gives a person wings. One day, the "northerners" kidnap a pupil of Asterix and Obelix, who is unable to stand up for himself. Comrades who have repeatedly defeated the Roman legions will have to save Prostopnix, who has become a victim of a confluence of ridiculous circumstances. The enemy is strong, but the main characters are always used to going to the end in their endeavors.