The monodreme

What would happen if you could make anything happen? When four ordinary British school kids have an encounter with a fallen angel from the stars one of them becomes as powerful as God. School time is over for everybody now, only there are still some questions to be answered. Who will be punished, who will be forgiven? What is worth saving, what will be erased? How do gods keep themselves from going insane with power, and why in Heaven and on Earth should they even try to?