Soon after being taken captive by a well-armed American militia Travis is reunited with Nick in a confinement cell, while Madison and Alicia receive a warmer welcome from their disturbed young leader -- whose people are conducting experiments on the dead.
The Clark family is separated after the helicopter takes fire, leaving Nick and Madison at odds about how to proceed when they arrive at a ranch filled with those wary of outsiders. Back at the hotel, Strand tries to ease a tense situation by becoming a doctor for the needy locals.
The Clarks attempt to integrate themselves into the Prepper community on the Otto ranch, and Alicia falls in with a surprising crowd. South of the border Strand seeks out a powerful former ally, uncertain what kind of welcome he will receive.
As Daniel Salazar fights to stay alive he falls into the company of a fellow traveler looking for some kind of redemption, leading Daniel to the Gonzalez Dam and the possibility of a new beginning.
Madison joins Troy on a mission to discover who shot down the helicopter, placing them in the cross-hairs of a dangerous new threat. Alicia makes a new friend at the farm, as Strand and Daniel make their way back to the hotel.
Loyalties at the ranch are strained after a Native American tribe threatens to take back the land by force, and a founding member decides to leave with his family.
Jake and Alicia arrive at the Black Hat reservation to sue for peace with Walker, only to find his father less than receptive to negotiations. Alicia encounters an old friend, and Madison decides to take matters into her own hands.
With the Otto Ranch reeling after a stealth attack, Madison confronts Walker to try and find a way to save her son -- knowing that war may now be inevitable. Ofelia remembers her first encounter with Jeremiah Otto, and Strand rediscovers the Abigail.
The arrival of Walker's tribe brings new tensions to the farm, as Madison and Jake try to keep a fragile peace. But unrest quickly leads to a violent confrontation.
As resources dwindle at the ranch Walker and Madison go in search of water, leading them to a cutthroat bizarre where Madison encounters an old friend. Back at the ranch, Nick and Alicia attempt to prevent tensions from boiling over while enforcing strict water rationing.
Madison, Walker, and Strand arrive at the dam, where Daniel attempts to guard Lola and their resources as they distribute water to increasingly hostile villages.
As Jake considers abandoning the ranch and setting out for a more sustainable home, Troy returns with a cryptic warning about a chaos that will descend upon them.
With the ranch overrun, Alicia finds herself trapped inside a survival bunker with the last survivors -- and the air running out. Meanwhile, Nick and Troy engage in a desperate bid to lure the herd away.
Madison brings an ailing Ofelia to the trading post to meet with her father, but clashes with Strand about whether the move is still worth all that they are giving up. Elsewhere Alicia attempts to survive on her own and encounters a potential adversary, while Nick faces temptation.
While Madison considers what sort of future the dam could have for her family, Troy and Nick arrive with a warning that a dangerous group is planning to attack. Alicia and her new companion run into trouble on the road, leading to a new opportunity.
Proctor John arrives to assume control of the dam, leaving Strand and Alicia caught between family and survival. While Strand attempts to smuggle Madison and Nick out of the facility, Daniel also fights to stay alive.
