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.
Casshern, Lyuze, and Ringo finally reach Luna's castle, where they find countless robots hoping to be spared from the Ruin. Dune is among their ranks, but Luna's treatment of her former protector is shocking.
Despite his ragged condition, Dune continues his search for Luna. The robot once feared as the "God of Death" is ceaseless in his quest, but a rematch with Casshern puts his dream of a reunion on hold.
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.
The search for Luna leads Casshern and Friender to Margo, an artist who refuses to let the Ruin destroy his spirit. Casshern finds inspiration in the artist's vision, but there are those who would rather see him dead.
Friender receives help from a caravan of robots and humans after Casshern is trapped beneath falling debris. But when the canine's new allies unearth the man who killed Luna, the situation takes a violent turn.
A rescue attempt by Casshern lands him at the bottom of a graveyard for abandoned robots. While a sweet - but simple - young girl tends to his wounds, Casshern hears whispers that Luna may still be alive.
Lizbell is obsessed with building a giant bell to remind the world that beauty still exists. She scavenges parts from decaying robots, and Casshern's pristine body could be the final piece of the puzzle.
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.
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.