Exhausted, burnt out, and dreaming of getting away from the cold, the slush and the violence of Boston's criminal underbelly, special detective Harrison Edwards receives a phone call in the dead of night. A phone call that would change his world forever. A serial killer is loose. Someone bent on wiping out young, attractive women is tearing up the city with calculated madness, and it is up to Edwards to track down the killer and put an end to the evil deeds gripping the city. A body is found—staged in ritualistic manner—and then another, and another. Time is running out as Edwards is plunged into a world of the occult, sacrifice and madness. In order to trap the killer, he goes undercover at a convention, and what awaits him when he gets there is beyond any horror he has ever seen.