In the world of Oblivion, a MMORPG game, where the player called Dante manifest an overwhelming strength, magic, power, intelligence and wrath that was enough for the game itself to make him the Demon King, King of an entire empire called "Nebulous". One day Dante was diagnosed with cancer and soon to meet his end. He decides to spend his last remaining moments in the game as the servers begins to shut down for him. To his surprise, despite the time limit for his life ending, Dante still remains in the game! Dante is still fully conscious as his character and, additionally, the non-player characters appear to develop personalities of there own. Confronted with this miracle, Dante commands his loyal servants to help him investigate and dominate the new world of Oblivion. This is the story of the Demon King, Diablo.