A brilliant midwife and gynecologist, Lena's husband Serezha is an actor at a regional theater. There is no sex between them, but they are very close and affectionate to each other. Lena has a suspicion that Serezha is cheating on her, but she keeps it to herself and doesn't show her feelings. While she should be working on her marriage, Lena is betraying her spouse with random acquaintances. Soon, the parallel existence of Elena begins to take over and alter her primary one.