In the summer before their freshman year in high school, Julie (Alexa Vega) has a slumber party with her best friends, Hannah, Yancy, and Farrah -- and they end up having the adventure of their lives. In an attempt to cast off their less-than-cool reputations once and for all, Julie and her friends enter into an all-night scavenger hunt against their "popular girl" rivals. Sneaking into clubs, hijacking dad’s car, evading Julie's mother, and maybe even a first kiss -- anything's possible at Julie's Sleepover.