At school, during a game of tag, Harriet loses her notebook. Her classmates find it and are appalled at her brutally honest documentation of her opinions of them. The students form a "Spy Catcher Club" in which they think up ways to make Harriet's life miserable, such as stealing her lunch and passing nasty notes about her in class. In return, Harriet regularly spies on the Spy Catcher Club through a back fence and concocts vengeful ways to punish them. After getting into trouble for carrying out some of her plans, Harriet unsuccessfully tries to resume her friendships with Sport and Janie as if nothing had ever happened. When Harriet's grades go down, her parents confiscate her notebook, which only depresses her further.
At school, during a game of tag, Harriet loses her notebook. Her classmates find it and are appalled at her brutally honest documentation of her opinions of them. The students form a "Spy Catcher Club" in which they think up ways to make Harriet's life miserable, such as stealing her lunch and passing nasty notes about her in class. In return, Harriet regularly spies on the Spy Catcher Club through a back fence and concocts vengeful ways to punish them. After getting into trouble for carrying out some of her plans, Harriet unsuccessfully tries to resume her friendships with Sport and Janie as if nothing had ever happened. When Harriet's grades go down, her parents confiscate her notebook which only depresses her further.