Chloe, an apprentice priestess, leads a double life by day at a remote church and by night as a skilled card player in a bar, a far cry from her religious duties. When a wealthy paladin named Erald recognizes her talents, he proposes a dangerous mission: to pose as a saintess candidate and uncover a murder within the grand cathedral from two years prior. Intrigued by the generous reward, Chloe agrees to Erald's offer, embarking on a quest to unravel the secrets shrouding the apothecary's death within the sacred walls of the main church.