Dexter's loyalties are put to the test as he follows clues that the Ice Truck Killer leaves for him. But as Dexter goes on the hunt, he wonders just how deep he will have to go down the Ice Truck Killer's dark and demented path. Doakes, still thinking that Dexter may be the Ice Truck Killer, uses questionable methods to stop Dexter from his hunt for the Ice Truck Killer. Meanwhile, as Dexter remains unavailable to Rita, her ex-husband, Paul, tries to convince her that Dexter is a very dangerous man to have around their children.