Katya wants a new gadget, but for this she has to grow up, becoming the only adult in the family, while Valera, Darina and Tamara Petrovna learn the delights of summer holidays. Meanwhile, the Ivanovs are approached by a young man whose life has radically changed for the better after completing the marathon of desires. The Ivanovs find out that the man has witchcraft on him, and his luck does not belong to him.