Build Up, Koutetsu Jeeg!. Kyushu was once the site of the final battle between Steel Jeeg and the Great Kingdom of Trouble. Since that day, it has been covered by a mysterious barrier "zone" and communication has become impossible. 50 years since then... The southernmost town of Honshu overlooking Kyushu, which is blocked by the “zone”. High school rider Kenji Kusanagi suddenly encounters Haniwa phantom god Magura, who appears from the ground...