This book is a work of childrens literature. It will take you to experience the charms of the demons world. Lets join Ding Xixis thrilling and dangerous journey. To finish his homework, Peter goes to mans world and catches Ding Xixi in Liantian School. Back to the magic world, Peter works his magic to exchange bodies with Ding, when she is about to be executed. Thereafter, Ding under Peters identity studies goes to school and Peter under Dings identity studies in Liantian School. After a series of strange and eccentric things, they finally meet again and regain their own bodies, returning to normal life.