Chiaki Yazu goes back in time to to find the killer of Yuri Azumuya a popular idol in the late 80's in Japan. Tokyo٫Japans beloved idol was seemed to have committed suicide but the way she died doesn't make much sense.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.