Lily Bridge, a young journalist, arrives at Arkham City, hoping to find a big scoop. However, with all the strange things occuring around the city, only the exceptional findings are news-worthy, such as the mysterious mecha known as Demonbane. However, upon finding a small piece of machinery that seemed to be connected with the Hadou Combine, Lily is determined to find the truth. Little does she know, she enters into a dark world, involving herself with Demonbane and the powerful forces that control the city.

In this prequel to the "X" TV series, a beautiful, young, bedridden dreamgazer named Kakyou remembers the life and death of a remarkable young woman whom he met in dreams. He also recounts his dreams of a tragic future in which the fate of the Earth will be decided.

His destiny has finally arrived as the young Shirou Kamui returns to Tokyo after 6 years. A powerful psychic, Kamui vows to protect the happiness of his childhood friends Fuuma and Kotori, even if it means avoiding them. But fate is cruel, whether or not Kamui wants to be involved; he holds the future of the world in his hands, given the choice of becoming a Dragon of Heaven or a Dragon of Earth. The Seven Seals gather, and so do the Seven Angels; all individuals who have their destiny carved out as one who would battle for the fate of the world. What future will Kamui choose to become reality?

In the great city of Metropolis, severe community structures and prejudice dominate a world where humans and robots live together. Unrest and violence increase with each new day. Searching for the scientist Dr. Laughton, suspected to violate human rights by trading organs, the Japanese detective Shunsaku Ban and his nephew Kenichi arrive at Metropolis. In the scientist's laboratory, Kenichi discovers a girl without any memory of her past life. He decides to help her, so they run away together. His uncle follows him and penetrates the dark secrets of the city to find Duke Red, the man ruling from the shadows. Meanwhile, Kenichi desperately tries to protect the mysterious girl from the people hunting her. However, Duke Red and his adoptive son have their own deep reasons for chasing the girl. These reasons are connected to her true identity and the struggle for the domination of Metropolis...