Virginia forces Alicia and Strand to clear an unusual walker threat, where an encounter with a new ally gives Strand an idea that could be the key to their freedom.
John is settling in as one of Virginia's rangers when a mysterious death sends him on an investigation that makes him question everything he thought about himself.
A deadly explosion in the oil fields sends June on a mission to save as many lives as possible. But, an investigation by Virginia threatens to undermine June's work.
When Dakota goes missing, Strand sends Alicia and Charlie on a search and rescue mission to find her; an unlikely ally provides a new possibility of escape from Virginia.
A threat worse than Virginia is on the horizon; Morgan calls for unity and invites all survivors to his settlement, tasking Daniel to keep the peace; however, Daniel will need to face his own challenge in hopes of protecting his friends.
Grace wakes up with a case of amnesia and sees what has become of her friends after she has been gone for years, and she struggles to put the puzzle pieces together on what has transpired.
In a race against time to stop Teddy's plan, motives are revealed and convictions are tested as Morgan and his allies infiltrate and make their way through the beached submarine that holds the tools for Teddy's destruction.