A dog named Buck loves his quiet life. The animal likes to be a home dog with loving hosts. But suddenly the quiet life of the friendly pet from "The Call of the Wild 4K Ultra HD" changes. A new phase in his life is coming for the dog, with lots of travel and adventure. When the gold rush starts in America, Buck becomes a full participant in this process. The dog, along with many gold diggers, sets out to mine gold. Every day he has to face new difficult conditions. Although, only recently Buck has played on the lawn near his home and never faced starvation. Now, Buck has to adapt to severe and savage Alaska imbued with cold. Buck gradually gets used to the reality and becomes a sled dog. He and other dogs are working together for the postal service. Buck is successful in his duties, and in a short time he manages to become the leader in his sledding. However, from his daily hard work, Buck becomes cruel and lost everything good in him before. The situation will change when the dog meets a man with a sense of compassion.