In 2047, an unknown, alien life-form, codenamed FOS, attacks Earth, destroying the world’s major cities in one fell swoop. The survivors unite to fight back, and three years later they erect a world shield, the Diffuser, to stop further invasions. Now in 2053, a last, desperate counterattack is being mounted against the FOS. Taishi Akejima, a soldier in the Planetary Defense Forces Alliance, would like nothing better than a shot at the aliens responsible for his father’s death six years ago. However, the new offensive requires a powerful weapon to be deployed and the Diffuser to be disabled, leaving the entire planet terribly vulnerable once more. Will humanity regain the stars or lose everything in the final, ultimate gamble?
In the different language versions, some of the character's names were changed.
Character name: Taishi Akejima (Japanese), Hiroshi Akishima (English), Hiroshi (French)
Voiced by: Mamoru Miyano (Japanese); Blake Shepard (English), Tony Marot (French)
Character name: Koyomi Akejima (Japanese), Koyomi Akishima (English), Koyomi (French)
Voiced by: Kaori Ishihara (Japanese); Brittney Karbowski (English), Jennifer Fauveau (French)
Character name: Kōshirō Akejima (Japanese), Koshiro Akishima (English), Kôshiro (French)
Voiced by: Masami Iwasaki (Japanese); Rob Mungle (English), Marc Brétonnière (French)
Voiced by: Kenjiro Tsuda (Japanese); Illich Guardiola (English), Jochen Haegele (French)
Voiced by: Yuka Terasaki (Japanese); Luci Christian (English), Magali Rosenzweig (French)
Voiced by: Junko Takeuchi (Japanese); Tiffany Grant (English), Virginie Ledieu (French)
Character name: Commissioner Yoshizawa (Japanese), Area Commander Yoshizawa (English), Seiji (French)
Voiced by: Yusaku Yara (Japanese); John Swasey (English), Frédéric Souterelle (French)
Voiced by: Greg Ayres (English), Grégory Laisné (French)
Voiced by: Yusaku Yara (Japanese); David Wald (English), Bruno Meyere (French)
The ending theme is "Ryūgū no Tsukai" (竜宮の使い) by Chitose Hajime.