这是一个新的学年, Greg Heffley 发现自己被扔进了中学，在那里，身材矮小的弱者与高大、刻薄、留着胡须的孩子共用走廊。 正如格雷格在日记中记录的那样"危险总是出现在你准备好长大之前"。这些故事通过文字和图画独特地展示出来。

It's a new school year, and Greg Heffley finds himself thrust into middle school, where undersized weaklings share the hallways with kids who are taller, meaner, and already shaving. The hazards of growing up before you're ready are uniquely revealed through words and drawings as Greg records them in his diary.