The bus George and Lennie were taking stopped earlier, so they couldn't make it to the ranch. They settled down and ate beans.
George and Lennie finally make it to the ranch George tells Lennie to not talk when talking to the boss, so the boss doesn't think Lennie is retarded.
Lennie gets a puppy from Slim and spends every free second he has in the barn with it. One of Lennie's favorite things to do is petting things.
Crooks is alone in his room when Lennie comes in, Crooks asks him to stay and sit, during their conversation Lennie reveals the secret about the farm.
Lennie is in the barn holding his little puppy that he just accidentally killed. He's yelling at the puppy as though it's the puppy's fault that it's so small, and it died.
George kills Lennie because he didn't want him to suffer because the other guys were going to get him, Lennie accidentally killed Curly's wife. George makes Lennie's last memory be the dream about the farm.