Sanrisha, a land out of legend, suffers under the cruel reign of Toutaku Zaku. His empire's grip has left its people without hope. Three heroes step forward to rescue them: Ryuubi Gundam, Kan'u Gundam and Chouhi Gundam. The film recasts Romance of the Three Kingdoms with SD Gundams in the lead roles, delivering mecha action on the big screen. It was screened as a double feature alongside a Keroro Gunsou movie.