An angel falls from Heaven into the Abyss and builds a kingdom there — the kingdom of Hell, Naraku — becoming its King. He tries to make it beautiful, but Hell can never match the splendor of Heaven; insane fallen angels who survived the descent attack the demons, and the King grows weak. Spending his last power, he creates two sons from his own eyes: from his red right eye comes a golden-haired prince named Alex; from his blue left eye, a silver-haired prince named Platina. The King decrees that the twins must fight each other to determine who becomes the next ruler of Hell — and the loser will die. Alex and Platina, who have never met, are thrust into this battle by forces neither chose, while an unseen third hand secretly works to shape the outcome to its own ends.