Picking up from where the previous movie left off, Ranka's star career flourishes while Sheryl's health rapidly deteriorates after collapsing during a live performance. At the same time, separate factions are maneuvering behind the scenes seeking to control the Vajra horde by utilizing the singing abilities of the two songstresses. As the entire Macross Frontier fleet begins to wage the final war on the Vajra, Alto finally makes a choice between Ranka and Sheryl.