3 Gates of the Dead (3 Gates of the Dead, 1)

Sometimes, the most evil things come from the most holy.... Conflicted with his faith in God and the hypocrisy of the church, Aidan Schaeffer, a young assistant pastor, is in a constant state of spiritual turmoil. When Aidan learns that his ex-fiancée is the first victim in a string of ritualistic killings, he finds himself in the middle of an even deeper fight. Tormented by demonic threats and haunted by spirits, Aidan throws himself into investigating Amanda's death; all the while supernatural forces have begun to attack the people around him. The more questions he asks, the more he is drawn into the world of a mysterious Anglican priest, a paranormal investigation group and a rogue female detective investigating the murders. As the gruesome rituals escalate, ancient hidden secrets and an evil long buried threaten to rip Aidan's world apart.