The life of a priest seconded to a New Orleans police department begins to fall apart when he is wrongly implicated in the shooting of a suspect. However, it comes to light that the precinct is haunted by the spirit of a deceased policeman, who helps the beleaguered cleric to solve the case and clear his name.

The movie begins in Southern England in the Middle Ages and then six knights are seen riding in horses towards a destroyed town. They see the remains of burned buildings and dead people until they come upon a mother and her dead baby. She quickly dies and then a rhino-sized dragon flies overhead, the knights follow right behind, vowing to kill the creature.

A former FBI profiler, now a sheriff of a small town and a single parent of a high school aged daughter, begins to profile a series of unexplained murders only to learn that the monster he's profiling may be himself.