In her diary, middle school student, Jamie Kelly describes her life at home and at school, including her attempts to triumph over her nemesis, the beautiful and popular Angeline.

"Secrets have a way of getting out, especially when a diary is involved. 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, and one event in particular, behind him. Unfortunately for Greg, his older brother, Rodrick, knows all about the incident Greg wants to keep under wraps. But secrets have a way...