Earth faces an alien onslaught as the people of planet Zela, who once used advanced alien technology to uplift Earth’s cultures, now find themselves in peril. Their supercomputer Emperor Darius, desperate for a solution, plans to seize Earth to save his own world, which is threatened by a looming black hole. The only force capable of stopping Darius is the carrier superweapon Daiku Maryu and its eclectic crew, composed of an American navy pilot, a sumo wrestler, a kickboxing champion, and a host of psychic misfits. The newest member, Sanshiro Tsuwabuki, a brash baseball player whose arm was damaged during a Zelan attack, joins the team and seeks vengeance from the helm.