As the Four Year War rages on, the struggle for global domination between the United Federation and the Coalition of Advanced Science and Technology has lead to nothing but a stalemate.
CAST Ace pilot Capt. Inori finds herself stranded behind enemy lines after an unexpected UF assault consisting of Prototype Anti-Mobile Suit armor overwhelms her unit, the UAST Mobile Suit Strike Force.
The odds of survival are slim but the mission to find her fallen comrades has just begun.