A century ago, a cult attempted to open a rift to the demon realm and summon the banished demon god Istral.Before they could succeed, they were defeated by sibyls, holy magical beings, and the cult's dark magic was hidden away.When the rift between worlds suddenly appeared in the small kingdom of Niawa, only one sibyl arrived to help.A bloody war ensued as demons escaped until this sibyl called on the first Champion: a warrior given magic strength who alone keeps the demons at bay. Oly is the longest-living Champion, now in her tenth year of guarding Niawa.Refusing to return home, she clings to her calling. But her powers are fading, and in order to continue her duty, she needs to find a way to get them back, and fast.Despite her duty and fears, she finally travels home for the Day of Breath, the one day a year the rift sleeps. But disaster strikes when a new parasitic demon somehow spreads throughout Niawa.Amidst the bloodshed, Oly must find a way to face her weakening state and confront the crumbling of her beliefs before the Day of Breath ends and demons take over her world…