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.Desperate to prove his new found maturity, which only going up a grade can bring, Greg is happy to have his not-quite-so-cool sidekick, Rowley, along for the ride. But when Rowley`s star starts to rise, Greg tries to use his best friend`s popularity to his own advantage. Recorded in his diary with comic pictures and his very own words, this test of Greg and Rowley`s friendship unfolds with hilarious results.