Mikayla Davis is one of the most famous teenagers in the world. You'll see her on almost every movie poster and billboard out there. She's had two albums going to the top of the charts. She's talented and beautiful. And on top of all that, she's dating the teen heartthrob from One Direction, Zayn Malik. Mallory Davis is Mikayla's twin sister. The one no one knows. She's not famous. She goes to a regular high school where everyone gushes over her sister and her sister's boyfriend. Unlike everybody else, Mallory absolutely hates Zayn and will do anything to avoid him. The sisters live in two completely different worlds. But what happens when Mikayla gives into the pressure of everybody and begins doing drugs, getting drunk, and partying every single night? She's sent off to rehab, which could ruin her reputation. Her managers don't want that getting out to the public so Mallory is forced to act as her sister. She has to act in movies, perform concerts, and date the boy she hates. Can Mallory handle all of this in her life or will she give in just like her sister?