Greg Heffley is finding out that the road to fame and glory comes with some hard knocks. When he decides to tag along with his brother Rodrick's band, Greg doesn t realize what he's getting into. But he soon learns that late nights, unpaid gigs, fighting between band members, and money troubles are all part of the rock n roll lifestyle.

Back in middle school after summer vacation, Greg Heffley and his older brother Rodrick must deal with their parents' misguided attempts to have them bond.