A priest with a haunted past and a novice on the threshold of her final vows are sent by the Vatican to investigate the death of a young nun in Romania and confront a malevolent force in the form of a demonic nun.

When a cop who is just out of rehab takes the graveyard shift in a city hospital morgue, she faces a series of bizarre, violent events caused by an evil entity in one of the corpses.

The peaceful town of Centerville finds itself battling a zombie horde as the dead start rising from their graves.