Exorcist and Killer Nun

Valentin is a carefree exorcist who can see through any demon's disguise. But he hides a dark secret: he is Satan's son. During the First Holy War, Satan ripped out his heart and abandoned him on the battlefield. Twenty years later, Valentin is dying without it. To reclaim his heart, he sets out to find Satan and joins Isabella, a nun who prays by day, drinks and smokes by night, and hunts demons with a shotgun. As they chase Satan, the truth of the First Holy War emerges.