Emi once believed that the heavenly gods were fair and wise, while the earthly youkai spirits were bloodthirsty and evil. But now, as a treacherous deity prepares to destroy her world, and youkai become humanity's only defense, a much more terrible reality emerges through the veil of lies that Amy has been shrouded in since childhood. Despite the looming threat, Amy is unable to concentrate: Shiro is occupying her thoughts , the fox youkai who so skillfully and deftly won her heart. Soon - too soon - she will have to break the curse that binds his spell and memories. And once the ancient power awakens in him, the youkai with whom Emi is in love will change forever. And while the earthly deities prepare for battle with the heavens, Emi and Shiro must risk everything to defeat immortal, omnipotent enemies. Together they will find a way to save the world - even if it means they have to lose each other.