Erin is a saintess blessed with extraordinary healing powers.
Just as she is about to become engaged to the crown prince, she is stripped of her title as saintess for unjust reasons and exiled from the royal capital.
With nowhere to go, Erin wanders into an unfamiliar forest, where she encounters an injured phantom beast and a mysterious, beautiful young man named Kratos.
Whenever Erin uses her healing powers as a saintess, she is able to glimpse the memories of those she heals. Through this ability, she gradually forms heartfelt bonds with the phantom beasts.
Kratos, cold and distant due to his dislike of people, also begins to soften as he watches Erin sincerely care for the beasts—and little by little, he starts to show her a smile…