Demon Mechs, a race of fiendish monstrosities made of muscle and metal. Once the dominant species of earth, they have returned to bring a new age of tyranny, destruction, and end for humanity. Lead by their king, " The Chosen One ", they have successfully taken control of mankind's symbol for future and hope, Kings Rhode City. But from the chaotic uprising comes the unexpected return of the former Demon Mech King, Jiro. Seeking to reclaims his throne, Jiro enters KRC as he hungers for revenge.