在这部超级机器人马赫男爵动作/喜剧/奇幻片中,故事開始前的十年前，在天才科學家基奧羅古（ゲオルク·ララーシュタイン）處，學習機器人工學的嵐田陽一郎，知道了基奧羅古征服世界的野心，於是自己炸毀了完成的馬赫男爵後離去，後與妻子一起被殺害。
陽一郎在死前把馬赫男爵的設計圖交給兒子嵐田陽，十年後他20歲。并加入了國際救助隊KSS，並經由村野博士完成了第二個馬赫男爵。嵐田陽駕駛著馬赫男爵，為了世界的和平，而與基奧羅古率領的機械帝國展開了死鬥。
While on a vacation cruise with his parents Yu Arashida witnessed the death of his parents when a gigantic robot attacked his ship ultimately destroying it along with everyone on board, Yu was the only survivor. Flash forward several years into the future and Yu is now a grown up man being trained by his grandfather to pilot Earth's ultimate defender, Maha Baron (Mach Baron), a giant red robot designed by his late father and constructed by his grandfather. After his grandfather is assassinated by an evil organization whose goal is to conquer the world Yu becomes Maha Baron's pilot and along with the members of KSS (Kokusai Kagaku Kyojo Tai) will fight to defend the Earth from falling into the hands of these evildoers and their giant robot machines.
