Jason hasn't had his robot for long, but their short time together certainly has been exciting! Together they've faced-down the amped-up Voltes Shockley, the fast and furious Go Go Diablo, and even the combined might of the Army! But Jason's first series of robo-rumbles" aren't over yet! The insane, rock-eating Geo Slab is laying waste to poor, beleaguered Shimmer City, and the local police force doesn't stand a chance against this granite foe. Can Jason send Geo Slab back to the quarry and save his hometown without handing over Chiron to the military? What does a futuristic army need a robot for anyway? Will Jason ever let Juni tag along?