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.
The war of angels against demons reaches its climax, as all the players converge on the Tower of Etenamenki, where lies the Tablet of Heaven--the key to unlimited power. Having fought their way through the Gate, Setsuna and his crew find that Lucifer and High Angel Rosiel are already inside. Meanwhile, Sara, possessed by Angel of the Apocalypse Sandalphon, has made her own way to the Tower. Rosiel plans to use the tablet to control the universe. Sandalphon wants the power to unleash the Apocalypse, while Setsuna wants to repair and restart the human world. Who will reach the Tablet first--those who want to destroy the world, or those who want to save it?