Identical twins Jessica and Elizabeth are best friends, and they have always done everything together. But as they start middle school, Jessica is ready to spread her wings and wants to become a part of the exclusive Unicorn Club. Elizabeth starts to feel like Jessica is turning into a totally different person, and the girls soon realize they might not be as similar as they once thought. With some new friends and experiences, the twins discover the importance of having different interests but staying true to each other.