Dexter blames himself for Vogel's death even as he removes all evidence of his presence in Vogel's life, and Deb, pretty moved herself, vows to use her return to the force to help Dexter, although she warns him that if she catches Daniel she won't be handing him over for the table treatment. Also, Hannah's booked an itinerary for her, Dexter, and Harrison for only two days hence, but Dexter wants to take care of Daniel first, and an even bigger problem time-wise is the approach of a tropical storm that threatens to ground any outgoing flights.

From here, Dexter gets the shock of his life when he gets called into an interrogation room in which Quinn is interrogating Daniel on the Cassie case. Daniel claims just to want to clear his name, so he submits to a DNA test, which gives MM the knowledge that Daniel was Vogel's son. Also, Dexter puts two and two together and checks out the abandoned hospital at which Daniel's been killing his victims; in it, he finds Daniel's laptop with video of all his kills on it. Meanwhile, Clayton asks Deb about the hospital incident, and Deb tells him she was the one who took Harrison in. Not believing her, Clayton goes to Elway and tells him his suspicions, so Elway stops by to give Deb a fake apology while checking out the place, and although Deb kicks him out quickly, it's clear that Elway is on to Hannah, so Deb gets her to an airport hotel to wait until it's time to go.

Dexter lists his place, and who should show up to make an offer but Daniel, who proposes that he and Dexter take their leave of each other and both stay alive, adding that Dexter has much, much more to lose than he does – he'll go after Dexter's family if he doesn't relent. Dexter fakes his agreement but still plans to take Daniel out despite the mounting pressure on him to get out of Miami, and he sends the videos of Daniel's Brain Surgeon kills to a news outlet; with the combination of that and the arrest warrant MM has put out on Daniel thanks to the DNA test showing his familial link to Vogel, Dexter figures Daniel will be returning to his door, which does in fact come to pass – but Deb helps Dexter captures him, and soon, Daniel's waking up in the very chair in which he killed all those people. Dexter realizes that the kill holds no joy for him anymore, so he changes the plan up and has Deb come arrest Daniel – unaware that Clayton has been tailing Deb. When Deb steps out to say goodbye to Dexter, Clayton bungles his way in and releases Daniel, who kills him and uses his gun to shoot Deb, although she does land one in his arm before he escapes. With Deb's life hanging in the balance and Elway at the airport just steps away from Hannah, it looks like the storm's not the only dark thing coming in the series finale.