An officer named Kate Sullivan is critically wounded in the line of duty during a pharmacy robbery, inadvertently caught in a media frenzy that paints her as a trigger-happy cop due to misleading footage. The negative press leads to public outcry, resulting in the hospitalization of Sullivan without proper support from her department. Meanwhile, Matt Cordell, the undead former police officer known as the titular character, wrongly believes Sullivan to be dead and seeks to avenge her, seeing her as a fellow victim of betrayal by the system they both once served. Misguided in his quest for justice, Cordell's violent retribution results in a slew of new victims.

Detective Sean McKinney, the protagonist who understands the threat posed by Cordell, is on a mission to stop the vengeful spirit once and for all. As Cordell goes on a rampage, seeking retribution against those he holds responsible for Sullivan's situation, McKinney investigates the circumstances around the shooting that led to her being discredited and targeted by Cordell's wrath. Uncovering a deeper conspiracy within the police force and trying to protect the innocent from Cordell's misguided sense of justice, McKinney wrestles with the corrupt system and the supernatural threat that Cordell poses, racing against time to bring an end to the chaos.