The adventures of an unusual dog, part St. Bernard, part Scotch shepherd, that is forcibly taken to the Klondike gold fields where he eventually becomes the leader of a wolf pack.
Buck, a dog that has been forced into the harsh life of a sled dog, befriends a man seeking his fortune in the Klondike gold fields, and must ultimately decide whether to stay with his master or obey his instinct to join the wolves.