The book describes the events in the life of the lonely, elderly Isolda Matveevna, who lives in a big city on the fifth floor of an apartment building in our time. Isolda Matveevna, according to her neighbors, the local police officer and her priest, is “a little bit of that” - she commits ridiculous and downright hooligan acts, breeds cats in the apartment, is mischievous and capricious. But suddenly the reader discovers that her heart is pink, like the cartoon kittens on stupid children's cards. No, not red - pink. She became friends with a five-year-old boy whose mother had died. But the child’s father is against his son’s friendship with the “crazy” old woman...