Gemma Sutherland isn't happy. A year after the death of her mother, her dad has married Shelley, whose daughter, Portia, is a spoilt brat. As if that wasn't enough they've moved house and Gemma has to go to Naylorsfield Comp where they don't let girls play football like they do at her old school.

Frustrated with her new life, Gemma rebels, shocks her dad by becoming a Goth and vows to drive Shelley and Portia away. She also starts a campaign to introduce girls football at school. Mr Cassidy, her PE teacher, lends his support and the other girls become interested, but Tyrone Collins, Shelley's big headed nephew and the star of Naylorsfield's First Eleven, will do anything to prevent the girls from training or playing in fixtures. Meanwhile, there's a mystery surrounding Shelley and Mr Cassidy, and Gemma sees her chance of getting rid of Shelley for good.