In this play, Evgeny Schwartz, in his virtuosic manner, mixes fairy tales and reality. Hohenstaufen is a successful economist. Days and nights he pores over his project, which is very important for the entire institution. But, as happens with successful people, he has enemies and envious people. First of all, Upyreva is a business manager. She planned to upset all his plans by quarreling Hohenstaufen with her beloved Marusya Pokrovskaya, the accountant of the institution. In fact, it turns out that Upyreva is an evil sorceress, and Kofeykina, who worked as a cleaner, is kind. Their eternal conflict now plays out here, around a pair of lovers who must be saved and an economic project that must be completed.