In the vast and icy frontier of Yukon, a dog named Buck lives a quiet life as the pampered pet of a wealthy family. However, his world crumbles when the family is forced to abandon him. Soon, Buck lands in the brutal world of the gold rush, where he is sold as a sled dog to a group of tough prospectors. As Buck faces the merciless challenges of the environment, from the struggle for survival in extreme conditions to interactions with other dogs and humans, he begins to discover his primal instinct.
Under the strict discipline of his new owner, a strong-willed but somewhat relentless man, Buck experiences the cruelty of nature and the loyalty among his kind. Through harsh adventures, Buck must learn to embrace his true self, transforming from a domestic dog into the leader of the sled team. With each obstacle, from confrontations with other animals to betrayal by his human companions, Buck evolves into the fierce and untamed leader he was always destined to be.
On his journey, Buck finds friendship in a few unexpected allies, and his connection to his inner instinct provides him with the strength he needs. Ultimately, the story becomes a powerful odyssey of self-discovery, exploring the struggle between the civilized and the wild, as Buck embarks on a quest to find his place in a world where the fight for survival is law.