Serguei is a 50 year old railway worker, seemingly cheerful and sociable. But within the intimacy of his gloomy apartment, he lives a terrible loneliness that he tries to make up for by watching funny shows on television. When it breaks down, he tries to repair it and overhears a couple’s argument in the apartment next door. Driven by a growing fascination for the woman’s voice, he starts to vicariously share her everyday life, till the day he walks through her door…