In a frozen and wild landscape, Buck, a huge and affectionate dog, lives a life of luxury as a pet in California. However, his world changes dramatically when he is kidnapped and sold as a sled dog in the Yukon during the gold rush of the 1890s. Suddenly, Buck finds himself in the midst of a harsh and brutal environment, where he must learn to survive and adapt to life in the wild. As he faces the adversities of his new reality, Buck discovers his primal instinct and the strength that lies within him.