Miranda has a big imagination, and always wins Word of the Day at school. When her sister Gemma is taken into hospital, Miranda escapes into her own fantasy land, Magnanimous. With giraffe police, ham sandwich trees and a Crystal-Clear Glass Hospital for Getting-Better Children, Magnanimous grows and grows. As her sister gets worse, things Miranda writes seem to trigger small miracles she has been asking for: her gran stops smoking, horrible Darren Hoey is nice to her! Can Miranda write a miracle for her sister?