Lauren is a sixteen years old girl who lives a normal life with her family. She gets average grades, has a boyfriend and wants to become a writer. However, her life turns completely upside down when one night another soul joins her body. The soul of a girl who is in almost everything the opposite of her and manages to take over her life in a short amount of time. Not only that: she gets carelessly thrown into a wide range of problems thanks to said sadistic troublemaker. But are they really as different as they think they are?