When the moon rises over the Klondike River, you can still hear the lovely howl of Buck, the most famous ghost dog of them all. Kidnapped, beaten and starved, Buck becomes a legend when he is shipped to the snowy northern goldfields to work as a sled dog. Buck's companions have become almost as famous. There's Spitz, the dog that Buck must fight for the leadership of the pack, the one-eyed Sol-leks, the tragic Curly, Dave, Joe, Pike, Dub and Dolly. And there's John Thornton, the new master who Buck comes to love. Yet Buck knows that one day he must leave the human world, for his ancestors are telling him to answer the call of the wild.