A-reum Marlowe's life shatters when she discovers her fiancé’s betrayal with her own sister. Heartbroken, she flees into a stormy night, where tragedy strikes—a sudden accident plunges her into darkness. But death does not greet her. Instead, A-reum awakens on a mystical, uncharted island surrounded by lush, enchanted forests and ancient ruins. She learns she is no longer just A-reum but has become Slyvia, the Saintess of Radiance, a mythical figure who was part of an ancient pact to protect the land of Arcadia from corruption.

Slyvia discovers she and three other saintesses were bound to eternal sleep to maintain the balance of light and purity across Arcadia. But something has gone terribly wrong—she is awake, alone, and the once-harmonious land is plagued by darkness and decay. To restore balance, Slyvia must find the sanctuaries of the three missing saintesses, uncover their fates, and reignite their dormant powers.

Her journey across Arcadia is fraught with peril and unexpected allies. Among them is Caelum, a mysterious and brooding knight who claims to be a guardian of the saintesses. Bound by an unspoken connection, their bond deepens as they traverse treacherous lands, facing beasts twisted by corruption and uncovering a sinister plot to destroy the saintesses’ eternal covenant.

But as Slyvia delves deeper into the mysteries of the other saintesses, she begins to uncover truths about her own awakening. Was her revival truly an accident, or was it fate? And what sacrifices will she have to make to save Arcadia—and her own heart—from the shadows threatening to consume them all?

In a tale of love, betrayal, and redemption, The Eternal Saintess  weaves fantasy and romance into an epic journey of self-discovery and the fight to reclaim a world lost to darkness.