Setsuna and Sara are brother and sister, yet they sincerely love each other. But the whole world seems to oppose their romance. While they are on the run, the universe of Setsuna changes when a being appearing out of nowhere kills his beloved, his anger then explodes and in the middle of a Tokyo in ruins, he discovers that he is the reincarnation of an angel banished by the Creator. His powers will therefore allow him to go to the Kingdom of the Dead to bring Sara's soul back to the world of the living. However, Setsuna is still unaware that he is the central element of a thousand-year-old war between angels and demons and that the outcome is approaching with his awakening!
