This document summarizes the story "Who Moved My Cheese" by Dr. Spencer Johnson. It introduces the four main characters - two mice named Scurry and Sniff, and two little people named Haw and Hem. Haw learns to adapt to change when he discovers the cheese has moved, while Hem denies and resists change. The cheese represents what people want in life, and the maze is where they search for it. The story shows how Haw was able to find new cheese by letting go of the old and not being afraid of change, unlike Hem who refused to adapt and was left alone and hungry.