Gabrielle Tomlinson, Louis Tomlinson`s younger sister has to keep a secret she hates. A secret she`s always wanted to erase and never find out. A secret that seems to change her life forever... Harry, Liam, Niall, Zayn (and Josh Devine) have to help Louis` younger sister, as well as stop his other sister Bailey being as spoilt as she is. Will Niall fall for the wrong sister and ruin his friendship with Louis, or be in the wrong relationship with the right girl?