Misato, the eldest daughter of the Kairyu-in family—the main house of the secret Onmyodo tradition. After her husband Yasu is kidnapped by suspicious individuals and she is driven to the brink mentally, her younger sister Aya's husband, Makoto, takes over the family leadership. However, Makoto begins using incantations to systematically control the family members for his own purposes. Realizing the conspiracy, Misato takes new action to protect her own safety.