Dying robots far and wide herald the saving grace of Luna. Meanwhile, Lyuze is disturbed to notice that Ringo has begun to rust, and Casshern is confronted by the monster who ordered him to Ruin the world.
Ringo's attempt to comfort Casshern leads her into a deadly trap. Ohji is quick to come to her rescue, but for them both to escape alive, Casshern must fight Dio as Braiking Boss looks on.
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.
Casshern and Dio continue their epic final battle. Although only one will survive, they've embraced the chilling reality that fighting is the sole purpose of their tragic existence.
Casshern and his friends enjoy the peace of their new lives until the Ruin destroys their happiness. Driven by grief, Casshern sets out to settle the score with Braiking Boss - and issue a warning to Luna.
Akoes warns Casshern against a life spent running from the past. When Friender arrives to make the assassin pay for his sins, Casshern chooses a path that could terminate his own existence.
Lyuze's psyche is bombarded by a labyrinthine barrage of illusions. Her nightmarish journey leads to a shocking discovery about her true feelings for Casshern.
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.
Beautiful Sophita is feared by robots who wish to live as long as their decaying bodies will allow. Fighting makes her feel alive, and Casshern's special abilities make him a foe she could fight forever.
Lyuze reveals her reason for hating Casshern, who offers her a chance for revenge. When robotic bandits attack Ringo and Ohji, Casshern comes to their rescue, but his rampage terrifies those he hopes to save.