Little girl Zhenya has such different grandmothers and grandfathers: simple, cheerful, noisy Valentina and Ivan, and intelligent Olga and Yuri. It seems like they could never get along under one roof, but a coincidence brings them together: the relatives come to take care of their granddaughter and find themselves having to share the territory and Zhenya's attention. Initially not liking each other, the in-laws soon become best friends, raising the girl together and even starting a joint business. They are never bored.