Hidden under the canvas of a priceless painting is a map that leads to a secret vault in the dungeons of the Moscow Kremlin. In this cache, among other treasures, there is an ancient box made of pure gold. And the box contains something so terrible that it is doomed to be kept forever in an underground prison. To bury this secret forever, the former owner of the painting asks her friend Michael St. Pierre, a former professional art thief, to steal the painting and destroy the map. However, a man who is obsessed with the desire to take possession of this secret offers Michael a simple deal: a box in exchange for the life of a person close to him...