Jirai, the son of a great general who fell out of favor because of Marshal Hidler, appears before the great Demon Brai proposing to personally take care of the Getta Robot. Meanwhile, the Getta team, thanks to precise marine detections, identifies the enemy's base but at the same time the Jirai monster attacks the Tokyo bay and the Getta Robot must rush to face the enemy who manages to escape without the three heroes being able to locate the enemy stronghold . Some time later the monster unleashes a second attack and Getta intervenes again, managing to penetrate the enemy base but it was a trap: the robot is blocked by powerful hooks that prevent any movement. But when Getta Dragon is about to be destroyed, an accident caused by a sabotage of one of Hidler's underlings allows the heroes to escape.