When female forensic pathologist Dr. Sam Ryan stumbles upon a mutilated body in a graveyard in the dark of night, the quiet English town of Northwick is changed forever. The evidence seems to point to a peculiar ritualistic killing linked to the black arts, and the murder bears an uncanny resemblance to a local crime committed years ago. Then another related death is discovered, and Sam's expertise is relied on to find evidence the police desperately need to solve the case. As Sam and her team delve deeper into the strange circumstances, elements that once seemed like coincidence soon appear to belong to a larger, more horrific plan.