Birk the Berserker is the biggest, strongest, tallest Viking in the village. He is also the biggest cowardly wuss in the village. He hates fighting, get seasick at the thought of going on a raid, and is scared of all the Viking girls. His mother is ashamed of him. Harold the Thump is disgusted with him and sets out to teach Birk a lesson. The results are not quite what anyone expects -- least of all Birk.
