Casshern and his traveling companions befriend three children claiming to be descendents of Luna. When the youngsters are attacked by Leda, Casshern risks his own life to protect them.

Luna asks Casshern to serve as her new guardian; Lyuze and Ringo lose faith in the promise of salvation; and Ohji returns with disturbing revelations about the Sun Who Was Called Moon.

Leda tries to convince Dio to accept Luna’s healing, but eternal life is no longer his obsession. Dio now lives only to fight Casshern - even if their battle ends in his own destruction.