Control — the Commonwealth's covert ops group — suspects a double agent within the Kingdom's royal family and dispatches Ange and the rest of "Team White Pigeon" to discover the truth. The first chapter of six-part film sequels for Princess Principal series.
While one kid is being bullied, another one witnesses the revolting situation. Filled with guilt, fear, and powerlessness; he starts wondering if just minding his own business is the right thing to do.
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 its final war on the Vajra, Alto finally makes a choice between Ranka and Sheryl.