Alex's faith is tested when her fiance Chase is possessed by a demon, and she is the only one who can save him. Caught in the never-ending war between the angels of Heaven and the demons of Hell, armed only with a divine artifact, a 19th century Englishman who once stopped Jack the Ripper, and her unyielding faith, Alex vows to endure any suffering to save the man she loves from eternal damnation.