While out scouting for Ginny, Dwight learns that his new partner Al has been keeping tabs on the woman she had a relationship with – and the two set out to try and find her and the organization she is working with.
As John Dorie settles into a new life as a ranger for Lawton, the death of one of the locals pushes him into an investigation that could set him at odds with Ginny.
Dwight and Sherry find themselves mixed up with a group of dangerous outcasts who want to take down Ginny. But after a reunion with Morgan, old friends may find themselves on opposite sides.
After a deadly incident in the oil fields June is called in to save as many lives as possible. But things are complicated when Virginia shows up to assess the situation in person, and finds evidence of sabotage.
After going to a dark place, John Dorie is reunited with Morgan and Dakota and agrees to help get them north – with Virginia's rangers close on their heels.
Dakota's actions force a tense standoff between Morgan and Virginia, with the lives of his friends on the line and old allies ready to turn on one another.
A tenuous alliance is strained when the young colony is attacked while Morgan is away, leaving Daniel to hold things together the only way he knows how.
Alicia, Wes, Al, and Luciana are welcomed into an unusual community living underground, led by an enigmatic man with a poetic vision of the future — and must get the locals to trust them if they are going to find Wes's lost brother.
Grace awakens to find herself in a future where the settlement is thriving. But as she struggles to put the pieces together, she becomes convinced that her unborn child holds the key to the future.
While looking for information about the group that is painting messages all over the area, June encounters a solitary man with the same goals – and is stunned to discover who he is. Dwight learns what Shari is planning.
Teddy takes Alicia and Dakota on an excursion, taking them deeper into his psychosis and leading to a chance encounter with a man Alicia's mother once saved.
Morgan leads a group to infiltrate a beached submarine, where Teddy is planning to launch a devastating missile strike. Strand makes a move of his own.
With a cluster of warheads about to rain destruction, each of the survivors considers how they wish to live out their final moments – each one revealing their true colors.
