Casshern desperately seeks to unravel the mystery of his dark past. An altercation with Dio, his robotic mirror image, could provide answers to his many questions - or at least get him killed.

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.

Lyuze sees the frightening reflection of her own mortality in the visage of a defiant female warrior who refuses to go gently into that dark Ruin.

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.