The Treasure of Gustav the Torturer

During the war, the infamous Gustav extorted a vast fortune from his prisoners, promising them freedom but then reneging and torturing them anyway. In the war's aftermath, Gustav's henchman Nickolas searches for a map to the treasure, leaving mutilated bodies in his wake. Where is the map? Can Gustav's surviving victims evade Nickolas, locate the treasure, and exact vengeance for Gustav's crimes?