Kairi Tomlinson. 15 years old. Sister of none other than Louis Tomlinson himself. Sounds pretty great, right? Well, you thought wrong. Sort of. Her and Lou have a very close relationship. He's not only her big, and only, brother, but he's her best friend. But when he leaves to audition for the X-Factor, her world suddenly fills with drama, fun, romance, heartbreak, and excitement. She finds herself in love with a certain member of the newly-formed One Direction, and then her world slowly falls apart because of him. Who will be there to help her pick up the pieces?