The team gets recruited to perform in a play about a Phantom in medieval Japan. As they're rehearsing, Koito notices the presence of a real Phantom nearby.
A pair of Phantoms terrify people as they try to cross a bridge. The team goes to investigate, and Mai begins to remember something odd about the place.
The team sets out to deal with security robots turned Phantom. But it turns out that Minase Koito was already there, fighting the haywire robots with her beautiful voice.