Sam Vimes is a man on the run. Yesterday he was a duke, a chief of police and the ambassador to the mysterious fat-rich country of Uberwald.

Now he has nothing but his native wit and the gloomy trousers of Uncle Vanya (don´t ask). It´s snowing. It´s freezing. And if he can´t make it through the forest to civilization there´s going to be a terrible war.

But there are monsters on his trail. They´re bright. They´re fast. They´re werewolves - and the´re catching up.