In chapter 1, Buck gets kidnapped by the grader from his home in Santa Clara.
I'm so glad i was able to adopt you, with me you wont be getting whipped
In chapter 3, buck and Spitz had fought and the reason behind the fight was that Spitz had layed down in Bucks nest
In chapter 4, Buck ends up becoming leader he has his team work together to finish his run, ends up having to say bye to Perrault and francois since his team did end up becoming part of a mail service in Yukon.
In chapter 5, John Thorton does not like how Charles and Hal keep whipping the dogs so he ends up adopting Buck.
In chapter 6, Buck finally finds a master who he loves which is John Thorton having him feel genuine love. Which they rest up to get their energy and strength back.
In chapter 7,the yeehats did a surprise attack on Thorton and the dogs and Thorton ended up being killed