A.D. 2089 - Eighty years have elapsed since Space War I altered the lives of both the human and Zentraedi races. Both species coexist in peace on Earth until a new alien race, the "Marduk," emerges within the Solar System. While covering the initial battle between the U.N. Spacy and the Marduk fleet, SNN rookie reporter Hibiki Kanzaki discovers Ishtar, an "Emulator" that boosts the Marduk's combat capabilities through singing. Hibiki brings Ishtar to Earth to teach her the values of life and culture. Alongside ace Valkyrie pilot Silvie Gena, Hibiki and Ishtar must find a way to save Earth from total destruction by the Marduk leader Ingues.