It is 1987 and Jenna is a 13-year-old girl on the brink of womanhood. The problem is that adulthood is just not arriving fast enough. She's suffocated by her dorky parents, ignored by the hip kids in school--and the cute guy she has a crush on barely knows her name. No longer content to spend time only with her best friend and neighbor, Matt Flamhaff, Jenna invites the cool kids to her 13th birthday..