Emerging from a grueling three-year cryo sleep, Tennin and Muriel awaken aboard a ship with no recollection of time passed, only to land on an unknown red planet. Confronted by an ambush of cloaked figures upon exploration, they learn the planet is inhabited by angels who've defied the god Apophis, including Tennin and Muriel's destined ally, Rasad. Rasad reveals a shocking truth: to regain their wings, symbolic of their freedom and power, they must undergo a perilous process that metaphorically involves facing death.