After a chilling brush with death during her engagement party, Ichika comes to realize two things--first, someone out there is plotting to take her and Noah's lives, and second, Ichika possesses the magical restorative powers of a saint, just like her sister. Determined to use her newfound gift for good, Ichika accepts a mission to purify a river with Noah. But this unfamiliar territory is fraught with danger, especially for an inexperienced saint who has learned nothing of magic...Has Ichika taken on more than she can handle? Or will she discover power in herself beyond her own expectations?