It is Christmas Eve and eleven-year-old Mouse is travelling in the car with his mother and two sisters.  It is Christmas, it is snowing and visibilty is bad.  The car crashes and Mouse is thrown from the car. 

When Mouse awakes, he meets a horse called Nonky and a sheep named Bar.  He knows he is not in his world anymore.  This is the start of his quest to find a castle in a world of monsters, knights and wizards.