Strange advertisements are posted all over the city: a visiting circus performer invites pet owners to bring their pets to him. And with the help of mysterious spells he will force them to perform incredible tricks - ones that no trainer has ever been able to achieve before. People rushed to the circus with their cats and dogs. Indeed, the animals in the arena surprised everyone - the cat rode a bicycle, the dog danced a waltz and... embroidered a portrait of the owner! But what is it? After a short time, the animals that performed miracles in the arena became old and sick. What did this strange trainer, who is able to transform from an old man into a young man, do to them?..