It's the end of summer and Vulgar is miserable. He has to go back to school, and school is one of the most un-Viking inventions ever. However, his gloom turns to excitement when he discovers that the famous Viking hunter, explorer and survival expert, Otto the Bone-Cruncher, has joined the school to teach hunting. Vulgar can't wait to get out into the wild! But, having been dragged into the high mountains above Blubber, Vulgar, Freya and Knut are forced to sleep on rocks, wash in freezing streams and eat raw slugs. Vulgar is also sure a Troll is following them! Life as a hunter isn't quite what Vulgar expected and suddenly school looks quite cool.