The Riddle (1997)

Set in and around the city of Perm, yarn is told from the perspective of Sasha (Ivanov), a boisterous 10-year-old boy, who lives with his drunken father, a prison guard. Still haunted by the sudden disappearance of his mother when he was a child, Sasha tries to gather bits and pieces of info about the circumstances of her death, which is surrounded with a veil of mystery.