R.D. is a delivery boy working for a company called Mach Storm to earn money for his search for the legendary Alpha Zoid, a Zoid about which he heard rumors from his dad and in which he passionately believes. Mach Storm also serves as a Zoid Battling team. During R.D.'s first Coliseum Zoid Battle, he encounters a team capable of fusing Zoids. R.D. soon discovers that he possesses a Zoid that can computably fuse with his own Zoid, Liger Zero. Following this event, R.D.'s adventure to uncover the truth about the Alpha Zoid begins.