In an old coat with a cardboard suitcase, Yulya arrives to conquer the capital. Her Aunt Valya helps her get a job as a live-in nurse for Alla Nikolaevna, a wealthy and capricious old woman who had a stroke. A little time passes, and Alla and her son Pavel grow fond of Yulya. Only Pavel's wife, Lena, does not believe in the "good angel". And she seems to be right…