At the Monastery of Saint Aurelian, sinners are brought to be purified - and Sister Aurora has always believed in its purpose. But when a defiant nineteen-year-old girl, Y/N, refuses every sacred ritual, something feels wrong. As Aurora discovers that Y/N is not human, but a harmless demon condemned to suffer, her faith begins to crack. Now she must choose between loyalty... and protecting the one the monastery was never meant to save.