Musician Zina works at the Golden Lily feminist club. She gives concerts there and always brings a big, heavy accordion there. Zina's husband, Vsevolod Slepakov, is not happy with his wife's occupation. Moreover, he accidentally finds out that his neighbors - the concierge Kulkova and the security guard Khlupin - are carrying out some criminal business with the help of Zina. If he had closed his eyes to everyone, he would have saved his life and many others. But the deadly flywheel has already begun to rotate, and no one can stop it...