Greg Heffley finds himself thrust into a new year and a new school where undersize weaklings share the corridors with kids who are taller, meaner...

Greg Heffley finds himself thrust into a new year and a new school where undersize weaklings share the corridors with kids who are taller, meaner and already shaving. Greg is happy to have his sidekick, Rowley, along for the ride. When Rowley's star starts to rise, Greg tries to use his best friend's popularity to his own advantage.