Getter Team shifted their focus to improving Neo Getter Robo once the Reptilian Empire crumbled. However, their preparations for battle were disrupted by a sneak attack from the Empire's resurrected leader. In desperation for a skilled pilot for Getter One, they enlisted a street fighter named Go Ichimonji. With a powerful adversary looming, victory seemed unattainable until the unexpected discovery of Shin Getter Robo, a weapon long lost to humanity. This groundbreaking discovery reinvigorated their determination to fight.