In a large provincial city, women, one after another, die from a sudden heart attack, each of whom owned her own business. The victims are united by one delicate problem: an unsettled personal life. All victims had to contact a marriage agency, but to no avail. There is also a nuance: before each death, an unknown person borrowed ten thousand dollars. And each, before she died, managed to tell someone that she was going to marry the best man in the world...