Caveman Robot once again faces off against the nefarious Ape Lincoln and his Confederate Union of Apemerica, as they threaten his adopted home, the fantastic city of Monumenta. But all is not as it seems, as a clandestine plot brews against our hero... and a foreboding prophecy comes from his Goddess, Oolar! Caveman Robot! He's a mighty, club-wielding mechanical champion with the spirit of primal humanity coursing through his every diode and capacitor!