In this fantastical tale of demonic battles and courtly intrigue, an onmyoji known as the "Heretic" faces a destiny that could overturn both the human and demon realms!

In an era when only a thin boundary exists between the mortal and supernatural realms, demons steal ten powerful artifacts known as the Sacred Relics from the human imperial capital. The emperor issues a decree to all onmyoji, masters of magic who serve and defend the empire: recover the Relics at any cost. Among their number is Hanayama no Fuzuki, known as the "Heretic," whose extraordinary abilities and arrogant attitude inspire equal amounts of respect and mistrust. As Fuzuki sets forth with his retainer Hakuro, they encounter the young half-demon Ranmaru, who possesses a startling connection to one of the Relics...