My arms are trembling with the tension of the loaded bow. I can feel Leon standing behind me, watching. Waiting. Hoping. ‘I dare you,’ he whispers. Cara has grown up in the shadow of the Wall, in a closed world of food shortages and high security. Her parents are dedicated to their secret work for the government, and it’s only a matter of time before her gifted younger sister follows in their footsteps. It’s all Cara has ever known, until the summer she meets Ava and Leon. Ava doesn’t care about rules. Nothing will ever be the same.