For years, a bloody war has been fought between the EUG and the ICSEO. The EUG having grown weary of battle has started to make attempts at peace. Amagi Asumi is the daughter of a hero admired by both sides of the conflict, therefore she has been chosen to be a figurehead for talks. She is to command the Elusion, a brand new ship built as a symbol to foster peace. However, on the day of the Elusion's launching an attack by the ICSEO violently thrusts the ship along with her inexperienced captain into the conflict.