A space fleet fleeing from the moon and the earth. Now that the goddess of solar system defense, Buster Machine No. 7, has been lost, humanity begins the path to the mainland decisive battle in order to confront the giant planet-scale enemy "Exerio Fluctuating Gravity Source". And finally, the Exerio Fluctuating Gravity Source appeared. L'Arc sorties with the final weapon "Douze Mille", the trump card for the survival of mankind!