The rural town of Solumthorne has become the setting for a series of strange incidents. Following the disappearance of the paranormal investigator Alice, the phenomenon of 'seeing double' seemingly became increasingly popular within the townsfolk. With the urban legend now affecting Aromé and the student council's everyday duties, they strike a deal with the new investigator and exorcist in town: If they can help her get to the bottom of this mystery, she'll protect them from their malicious doppelgangers.