When Dexter learns that the man responsible for ordering his mother’s death has been released from prison, he zeroes in for a kill that might end all kills.
Dexter visits Hannah in jail to explain why he didn’t protect her and she in turn explains why she did what she did.
At Deb’s request, Batista locates Arlene Schramm, the witness who saw Hannah McKay kill a counselor in a halfway house.
There is another victim of the phantom arsonist, the fifth in two weeks.
Isaak Sirko learns that the Koshka Brotherhood has sent two assassins to Miami to eliminate him.
Dexter tries to keep Debra in the dark about his relationship with Hannah, but a surprise visit from Astor, Cody and Harrison throws a wrench into Dexter’s plan.
Things heat up as Dexter and Hannah grow closer, and when Sal Price discovers the two are involved, he wants the exclusive story.
Dexter becomes more intrigued by Hannah, while Debra gets to know local crime writer Sal Price, who has dug up some possibly incriminating dirt on Hannah.
While trying to uncover why Louis was killed on his boat, Dexter must out-maneuver Isaak, who’s after Dexter – and Debra.
After capturing a deadly killer, things go awry for Miami Metro, sending Debra into a tailspin.