Did I make some kind of mistake?

Marquess's daughter Lydia was suddenly abandoned by her fiancé, the prince, and exiled to a convent. The one who took her fiancé from her was "Saint" Alicia, who was wrapped in a divine light. In despair, Lydia began to live quietly in a remote convent, but gradually a mysterious power began to awaken within her. Flowers bloom abundantly, wounds heal, and water becomes clear—it was the true power of a saint. Meanwhile, in the royal capital, doubts begin to be cast on the true identity of "Saint" Alicia.