The winter isn't ending. Nobody knows why. And Odd has run away from home, even though he can barely walk and has to use a crutch. Out in the forest he encounters a bear, a fox, and an eagle - three creatures with a strange story to tell. Now Odd is faced with a stranger journey than he had ever imagined. A journey to save Asgard, City of the Norse Gods, from the Frost Giants who have invaded it. It's going to take a very special kind of boy to defeat the most dangerous of all the Frost Giants and rescue the mighty Gods. Someone cheerful and infuriating and clever. Someone just like Odd...