When Greg Heffley begins his last year of middle school, his mother gives him a journal to write and draw in, and this book is the product of that year’s recordings. Greg begins his journal by describing the other students and analyzing middle school popularity, a quality he will seek all year. He tells the story of an old slice of cheese left outside on a basketball court. If someone touches the cheese, they are cursed and ostracized. Greg introduces his older brother, Rodrick, who plays drums in a heavy-metal band and plays merciless tricks on Greg; his younger brother, Manny, who is treated like a prince; and his best friend, Rowley. Greg is “super good” at video games even though his father is always encouraging him to spend more time outdoors. When Greg uses headphones to listen to Rodrick’s CDs that have parental warning labels, he gets caught and punished with a video-game ban. At school, Greg runs for class treasurer, but his inappropriate posters get thrown in the trash by the vice principal.