George and Lennie escape the guys chasing because Lennie got them in trouble. They go on a train to get work at a new ranch.
Candy greets Lennie and George in the bunk house. Lennie hears that slim has puppies and he wants one. Curley is rude to Lennie because he wants to pick on the big guy.
Carlson shoots Candy's old dog and slim makes the final decision. Lennie gets a puppy from slims dog. Curley attacks Lennie and Slim comes up with the lie that he got his hand caught in a machine.
George and the other guys go out to town and Lennie stays in the barn with his puppy. Lennie sees Crookes light and goes in his room. Crookes ridicules Lennie by telling him George isn't coming back.
Lennie accidentally kills his puppy and Curleys wife walks in and starts a conversation with him. She asks him to feel her hair and he dose but he won't let go and he accidentally breaks her neck and kills her.
Lennie goes to hide in the brush like George told him to do if he did anything bad. Lennie has visions of his Aunt Clara and a giant rabbit. George comes to the brush and shoots Lennie. Slim tells George it was what he had to do.