Celeste is a young woman who carries the memories of a past life, now reincarnated into a world ruled by elemental magic. But unlike those around her, Celeste's mana is pure and uncorrupted, making her one of the last of the Saint Swordsmen, an ancient order long thought extinct. Trained by the elusive master Kite, Celeste wields Sanctum, a rare form of pure mana that grants her enhanced physical abilities and immunity to corrupting forces, but isolates her in a world that values elemental magic above all else. Celeste faces personal challenges and unresolved feelings from both her current and past lives. In a world where elemental knights dominate, the mysterious Obsidian Order rises in power, mass-producing mana stone weaponry and industrializing the continent. They see Celeste as a potential recruit, unaware of the true extent of her rare abilities. As she navigates this complex world taking on dangerous quests, clearing dungeons, and uncovering ancient mysteries Celeste must learn to embrace her powers, find her purpose, and face the growing darkness that threatens to consume everything.