Simon is an eleven-year old boy who lives in a world of silence, lists and numbers. He hasn't spoken for years and he doesn't know why. Everyone at school thinks he's weird and his only friends in the world are his brother Davey and Superman, who's always there when he needs him. One day Simon shares his Vita-Weats with Cassie, the scary girl from his class, and a friendship starts to form. And the new teacher Ms Hilcombe takes an interest in him, and suddenly he has another friend as well. When Ms Hilcombe goes missing, only Simon knows where she is. But he has made a promise to never tell, and promises can never be broken. So now Simon is the only one who can save her.--Provided by publisher.