Sierra, a holy maiden, serves in the temple with the mission of healing the sick and injured. However, her sacred power is gradually fading, placing her on the brink of being expelled from the temple. At that moment, a newly appointed priest named Rudy arrives. In truth, he hides his real identity and harbors a secret plan to steal Sierra’s “miracle power.” While Sierra is busy training Riko—the holy maiden candidate she summoned from another world—Rudy slowly draws closer to her. As their intertwined fates begin to shift, Sierra must make a choice that will change everything. A Cinderella-like story of a holy maiden blessed with a unique and extraordinary power.