Strange things are happening in Pughouse: Cookie the pug decided that she was loved less than everyone else, got offended and ran away from home. And when she returned, the sisters did not recognize her. A little later, the raccoon Varya came running and declared that Kuki was actually her. All this was created by the mysterious Changer, said the smart Radochka. You need to find him and ask him to return everything back. But first you will have to do truly good deeds, ones that will not turn into evil for anyone! Can a good deed turn out to be evil? What a strange statement! None of the characters in the book understand what they should do now. But Cookie and the raccoon Varya need to be rescued from trouble. The residents of Mopshouse will have to go through more than one test to understand: good deeds must be done carefully and not everyone who asks for help should be helped! Illustrations by Lilia Rogoleva-Ashur.