Casshern and Lyuze find huge numbers of robot remains when approaching a valley. Inside, they discover that all the robots were heading to a strange circular megalith prior to their deaths. Climbing up, they witness an amazing spectacle; a garden of flowers grow atop the megalith which are seldom seen since the ruin. They also encounter Ringo and Ohji. Meanwhile, Dio faces a problem, when his reconnaisance group to seek out Luna's whereabouts is decimated by two mysterious robots. He organizes a group to search for the perpetrators, only to find Vulcan and Mars, who were considered Braiking Boss' best fighters next to the cyborgs. The pair are furious with Dio's rise in power and thus start targeting his army. Dio engages head on with Vulcan and Mars, but loses to their combined efforts. As he lays alone, injured and insulted, Braiking appears before him.
Ohji racconta a Kyashan il suo incontro con Ringo. Nel frattempo Dio deve vedersela con due robot che hanno distrutto una parte del suo esercito.
ルナを捜索していたロボット達が、見知らぬ二人組みのロボットに襲われて全滅した。精鋭部隊を率いて、謎のロボット討伐へと向かうディオ。偵察隊が襲われた地点で彼らを待ち受けていたのは、かつてブライキング・ボスの軍団で最強と謳われた二体のロボット、バルカンとマルスであった。迎え撃つディオであったが…。
