Pug Zephyrka, the best dressmaker of the Beautiful Valley, temporarily left her home and became the Guardian of Viktor Kuznetsov in the human world. But the unexpected happened! Two kind guys Ksyusha and Misha saw Marshmallow in the park, thought she was lost, and took her to their home. Entering the Povarovs' apartment, the dog realized that the family urgently needed help... Zefirushka and her friends from the Beautiful Valley have to overcome many obstacles so that Misha, Ksyusha and their mother find happiness. Is it worth forgiving the traitor? Will the evil done return to the one who committed it? Should we help someone who lies a lot? Marshmallow will have to find answers to these and other difficult questions. Having gone through many tests, Marshmallow and all the heroes of this book will become warmer and understand: the more kindness, attention and love you give to others, the more love blossoms in your soul!