In chapter 1, There was a gardener name Manuel, Who tricked buck, by taking him for a walk, but instead sold him to Perrault.
Chapter 2, Buck was experiencing his first day as a sled dog, which did not go very well. Curly another one of his fellow sled dogs, has gotten close to there leader Spitz.
Chapter 3, Spitz sleeps in Buck nest which cause them to fight and Buck wins leaving Spitz to die.
Chapter 4, Francois tries to make Sol-leks lead dog, but Buck makes it clear that he wants the spot by jumping on Sol-leks to get out of his way. He thinks quickly and punishes the other dogs when needed. He also helps new dog fit into the team.
In Chapter 5, Buck and his team are sold again. This time it was Hal, Charles, and Mercedes. They were all lacking skill, but in the end, John Thornton saves Buck because he didn't like how they whip him.
In Chapter 6, Buck finds a master he loved, Buck like John Thornton as the way he treated him. he was even willing to kill the man who argue with John. He also made a bet that Buck can pull a sled with 1,000 pounds on it.