Sue Ellen Crandell, a teenager, enthusiastically anticipates the summertime absence of her mother. While the babysitter watches over her rowdy younger siblings, Sue Ellen may party and enjoy herself. However, the babysitter suddenly passes away, leaving the Crandells short on funds. Sue Ellen lies about her age and experience on her resume to obtain a desirable position in fashion. However, as her siblings run amok, she finds the drawbacks of adulthood.