The angel Alexiel loved God, but she rebelled against Heaven when she saw how disgracefully the other angels were behaving. She was finally captured, and as punishment sent to Earth to live an endless series of tragic lives. She now inhabits the body of Setsuna Mudo, a troubled teen in love with his sister Sara. Setsuna's misery mirrors the chaos among the angels, and their combined passions threaten to destroy both Heaven and Earth.
Setsuna, in the form of Alexiel, must return to Earth to protect his human body. But Michael, the Angel of Fire, is hot on Setsuna's heels and ready for a fight. Will the angel Raphael be able to keep things from getting deadly, or will he just make matters worse?
Meanwhile, Zaphikel's spy discovers that Sevothtarte's fair face hides foul intentions, and Metatron's little rebellion upsets the balance of power in Heaven. And in Hell, the Mad Hatter offers Kurai a chance to save Setsuna's human body...if she agrees to marry Lucifer.