Christopher is 13 and he doesn’t stay out of places where many enchanting Christophers become magical, realizing the he becomes invisible.
Grace is an actor. The joy ends when she hates school and shrinks to the size of green haunted objects. She is a temptress and is catapulted out of a house.
Grace’s granny learns how to move objects with other people’s thoughts. Christopher fills Grace’s head with strange, quiet friends.