A girl who spent her whole life failing at being a knight discovers she was already a legend. The catch: that power comes from a life of unbearable loss, and reclaiming it means becoming someone she's not anymore. This show understands the difference between having strength and being strong enough to carry what strength costs.
Fia trains relentlessly to become a knight and prove herself worthy of her family's legacy, despite lacking the natural talent her relatives possess. During a routine demon-slaying mission gone wrong, she encounters a dragon and faces certain death. As her life flickers away, fragmented memories crash through her mind: a past existence where she was the legendary Saint who single-handedly vanquished the Demon King. That former glory came at a devastating cost, leaving her scarred by trauma and desperate to escape that identity. Now reincarnated with her previous powers surging back to life, Fia stands at a crossroads. The magical potential dormant within her could transform her into a warrior far beyond what her current world imagines possible. But awakening those abilities means risking the very identity she's spent this lifetime trying to avoid. As supernatural threats emerge that demand the Saint's power to defeat them, Fia must navigate the gap between the knight she wants to be and the legendary figure she's destined to become, all while keeping her true nature hidden from those around her.