In St. Petersburg, at the time of the White nights, Nina, a thirty years old young woman, buries her mother. The ceremony is an opportunity, for Nina, to meet with her brother Andrey who lives elsewhere. Andrey left the family home ten years before, to avoid that his parents discover his incestuous relationship with his sister.
In spite of their efforts to forget the past, their mutual attraction comes back and flusters their relations again. Although now grown-ups, they do not succeed in forgetting the world of their childhood.