Sled dogs were very popular during the gold rush in the 1890s in Yukon, Canada, on the world-famous Klondike River. And Buck is a very special example of these amazing animals. His story begins on a ranch in the Santa Clara Valley, California, when the then spoiled and spoiled domestic dog Buck is stolen from his home and put into service against his will as a sled dog in Alaska. In the harsh, vast, and icy environment, Buck becomes increasingly wild and unruly. Here he has to fight to survive and dominate the other dangerous dogs. He befriends the tough and hermit John Thornton (Harrison Ford). Finally, Buck throws off the cloak of civilization altogether and from now on only relies on his recovered original instincts and the learned new experiences, in order to assert himself as a leader in the wild.