In pursuit of the rich natural resources in outer space, man on earth sets up a special organization called ZAP SPACY composed of space experts to explore the unknown planets.

Ultra Galaxy Mega Monster Battle is the first season of its series that is the 24th entry in the Tsuburaya Productions' long-running Ultra Series. It is an adaption of the video game Mega Monster Battle: ULTRA MONSTERS. The show first aired on December 1, 2007 and concluded on February 23, 2008. On December 20, 2008, the second season titled Ultra Galaxy Mega Monster Battle: Never Ending Odyssey premiered. Ultra Galaxy was the first Ultra Series to be shown as a pay-per-view service.

Ultraman and his comrades from M-78 (including a new Ultraman, Zero, the son of Ultra Seven) join forces with other allies to fight a massive army of giant monsters led by the evil Ultraman Belial.

Tadao and Takaho are two scientists from an Ultra-spatial research center who discover a mecha emitting an alarm signal: a giant, monster sturgeon is approaching. This roller-coaster ride includes a love story, kaiju, mad scientists, and humanoid robots, all seasoned with big absurd humor and action packed battle scenes.