Casshern and Lyuze discover vast swaths of robot remains while approaching a valley. Inside, they discover that all the robots were heading to a strange circular megalith prior to their deaths. Ringo and Ohji meet up with Casshern and Lyuze, and the pasts of the former two are explained. Meanwhile, Dio faces a problem when his reconnaissance group, sent to find Luna's whereabouts, is decimated by two mysterious robots. He and Leda find Vulcan and Mars, who were considered best fighters of Braiking Boss next to the cyborgs. After being given an inspirational talk by Braiking Boss, Dio defeats Mars before Braiking Boss finishes off Vulcan.