Xanthe Fox cant wait to turn thirteen but as the big day arrives her world starts to fall apart. Set-up at school for something she didnt do it seems her age-old enemy Kelly is making trouble for her...and as things escalate even her best friend Saul starts to doubt her innocence. With the school threatening to expel her & mysterious glowing Xs appearing in front of her eyes Xanthe turns to Grandma Alice for help. But what the old lady tells her will change Xanthes life for ever...