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.
Continuing the hunt for his sister, Sara, Setsuna leaves Hades to search for her in Heaven. Unknown to him, Kurai and Kira are trying to revive his lifeless body. Their efforts pay off in an unexpected way-Setsuna awakens to find himself in the body of the angel Alexiel!
In Heaven, Sevortharte, who until recently had ruled in God's absence, is forced to publicly declare his loyalty to the mad angel Rosiel, Heaven's new ruler.
Now in Heaven, Setsuna wants his body back. His only choice is to ask for help from Raphael, the reluctant physician-angel, or the demon Lucifer...