Equipped with a gas mask and a crumbling map, the Assassin, an iron-clad humanoid, descends into a rusty, peril-laden underworld of grime, blood, and unsettling monstrosities. As the stealthy invader meanders through the labyrinthine post-apocalyptic wasteland on a mysterious mission, going deeper and deeper in the nightmarish realm, the Assassin gradually reaches his final destination: the heart of this grotesque tower of torture. But what cruel, vindictive deity allows fear and suffering to take its most complete creation further and further into despair? Only a Mad God would revel in humankind's ordeal.