Marcus, the new kid in town, wants to tryout for the undefeated high school football team in Pop, by Gordon Korman. While training by himself at a local park, he meets Charlie, a massive 50-something-year-old man with powerful football skills that he shares with Marcus. Estranged from the teammates who don’t want to accept an outsider, Marcus’s growing friendship with Charlie gives him a sense of belonging. But Marcus also begins to see that something about Charlie isn’t quite right. For an old guy, he’s a charismatic prankster who acts like a big kid, can’t remember Marcus’s name and runs away at the first sign of trouble. Then Marcus discovers that Charlie is actually a former NFL linebacker known as “The King of Pop.”