This is the second book in the Diary of a Wimpy Kid series
The main character Greg Heffley's diary starts with summer and the misery of being on the swim team, which was not his idea. His friend Rowley has gone on another exciting vacation that Greg doesn't want to hear about. His little brother, Manny, and his parents continue to drive him crazy.
However, Greg's older Brother, Rodrick is giving him a lot of grief because he knows about the embarrassing incident that happened to him during the summer. Greg doesn't want anyone to know about this embarrassing incident because he has just started a new school and is eager to fit in with the others. Rodrick holds this secret over Greg and uses it to blackmail his younger brother.
Will this embarrassing secret get out?