Gary Grasshopper and friends travel to another field to celebrate the birthday of Gary's best friend, Freddie Firefly. While there they encounter a group of cicadas who have been underground for thirteen years.
Gemma succeeds in starting a girls' football team at her new school, but bitter rival Tyrone does everything he can to stop the girls playing. So begins a battle of wits between the girls and boys, and also between Gemma and sports teacher, Mrs Lawfo
