不要问 Greg Heffley 他的暑假是怎么度过的，因为他绝对不想谈论它。 随着 Greg 进入新学年，他渴望将过去的三个月抛在脑后。 不幸的是，他的哥哥 Rodrick 知道这个秘密。 但是秘密是有被泄露的风险的，尤其是涉及日记的时候。

Whatever you do, don't ask Greg Heffley how he spent his summer vacation, because he definitely doesn't want to talk about it. As Greg enters the new school year, he's eager to put the past three months behind him . . . and one event in particular. Unfortunately for Greg, his older brother, Rodrick, knows all about the incident Greg wants to keep under wraps. But secrets have a way of getting out . . . especially when a diary is involved.