Darkness, chaos, demons dance... This is the world of the Hell Demon King, this is the world of Diablo, which has long been devoured all light and hope. But what happens when a DNF player travels here? Can the Prison Blood Demon God set off another Red Blood Frenzy? Is the heavy sword in his hand for hope or for destruction? The tide of chaos is coming again, and Andalil, Duriel, Mephisto, and Barr's power is becoming more and more violent. However, under the leadership of the new Prison Blood Demon God, humans finally have the courage to participate in the final battle...