Investigator Sergey Shumov has a mystery on his hands. On a platform near a Moscow-Sevastopol train station the police have found a young man without documents and no memory. In near perfect detail, he can recall historical dates, songs of his favorite band, but can’t recollect his name or say where he’s from. And frustrating Shumov’s search for answers even further are the young man’s personal belongings that offer not one clue to his identity.