For the past decade, Dexter has been living a quiet, isolated life far away from the temptations of his past. He's found comfort in a new identity and has assimilated into small town life as a beloved member of the Iron Lake community. When a local hotshot begins behaving recklessly, and a mysterious stranger seems to be on Dexter's trail, he questions whether he can continue to suppress the murderous urgings of his Dark Passenger.
Once an abused and abandoned child, Dexter is now a successful forensics pathologist... but lurking just beneath his charismatic personality is a terrible truth. Dexter has corralled his innate homicidal urges into a closely guarded second career: He hunts down and brutally murders those vicious criminals who have managed to avoid the clutches of the law. Basing his life on the teachings of his foster father, Dexter only kills people who truly deserve it: he ensures that those who got away with horrible crimes will never hug again.