Natsume claims responsibility for the fire incident and is taken away to be locked up! Luckily, Mikan and the gang aren't about to stand for this so they infiltrate the prison to save him. But it turns out more than just Natsume needs saving. Natsume's sister Aoi is imprisoned too, and the gang run into her dangerous captor: Persona! In a deadly showdown with the powerful Persona, Mikan gains a new alice...but will she live to use it...?!