Joel Miller (Troy Baker) confesses to his brother Tommy (Jeffrey Pierce) his responsibility in preventing the Fireflies attempting to find a cure for the Cordyceps fungus pandemic by saving Ellie (Ashley Johnson) from an operation that would have killed her.
Four years later, Joel and Ellie have built a life in Jackson, Wyoming, though their relationship has become strained.
While on patrol, Joel and Tommy rescue a stranger, Abby Anderson (Laura Bailey), from an Infected horde.
They return to an outpost being used as a temporary hideout by Abby's group, former Fireflies now part of the Washington Liberation Front (WLF), a militia group based in Seattle, Washington.
The group attack Joel and Tommy; Abby seeks revenge against Joel for murdering her father, the Firefly surgeon (Derek Phillips) who was to perform the operation on Ellie.
Meanwhile, Ellie and her girlfriend Dina (Shannon Woodward) leave Jackson in search of the brothers.
Ellie enters the WLF camp to witness Abby beat Joel to death and swears revenge.