The animals act strangely at the Chenoweths' farm; the family and neighbors search for missing Arlo.

No cars, cell service, or power, the Chenoweths and neighbors seek help. Maggie tends to Arlo.

Ruben and James seek help at the Navarros'. Arlo reveals the truth about what's going on.

James and Ruben are held captive at Navarros. Arlo, Meryl, and Nicholas meet McNab.

Travis, holding James hostage, recounts how he was shot and took refuge in the Navarros’ basement. James realizes the imminent danger to his family.

James, Ruben, and the kids bring wounded McNab back to the Chenoweths'. James has a chilling realization about his mother and her recent actions.

Suspicions grow as the group realizes one of their own poses a deadly threat to Arlo. Donald joins Ruben on a mission to settle unfinished business at the Navarros'. Maggie contemplates the unthinkable.

After discovering who among them is after Arlo, Maggie and James resort to the unthinkable to save their family and neighbors.