For 200 years, pastors of unknown origins have set up tent revivals on the outskirts of small towns, preaching their messages of salvation and healing. Are they really seeking to save your soul? Are they hustlers who just want your money? Or is it something even more sinister?

Although he’d attended many such revivals as a child, city morgue pathologist Cornelius never gave it much thought–until the dead woman on his table spoke to him.