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.

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