Hestia Familia and Loki Familia. One endeavors to save the Xenos- intelligent monsters whose origins are yet unknown. The other sees them as nothing more than simple beasts-enemies to be exterminated. In this ideological clash, Bell and his idol, Aiz, stand on opposing sides...but Bell wants to believe he can change her mind. Aiz is not easily swayed, and as she grips her sword, she knows the strength of her resolve will be tested...