Cherry Costello's life is about to change forever. She and Dad are moving to Somerset where a new mum and a bunch of brand-new sisters await. And on Cherry's first day there she meets Shay Fletcher - the kind of boy who should carry a government health warning. But Shay already has a girlfriend, Cherry's new stepsister, Honey. Cherry knows her friendship with Shay is dangerous - it could destroy everything. But that doesn't mean she's going to stay away from him...