Set fifty years after the original series, Kotetsushin Jeeg follows high‑schooler Kenji Kusanagi, who transforms into the titular mecha to battle the sudden resurgence of the Haniwa Genjin, clay‑robotic phantom gods, emerging from the Jamada Empire under Queen Himika. The story also features Tsubaki Tamashiro, the granddaughter of Miwa Uzuki, and Kyou Misumi, among others. Key characters from the original series also make appearances.