The year is 2047 AD, approximately two years after the Protodeviln War in which the United Nations discovered the Spiritia-enhancing potential of music. In this light, the popular five-member idol group Milky Dolls (yes, Milky Dolls) comes to a colony planet to perform a concert -- only to be captured by a fleet of Zentradi. Your mission is to fight through this massive armada of ships, pods, and fighters to save the idol singers.