The Matthews' family road trip takes a horrifying turn when they are detoured to a small pastoral town from which they cannot leave; when their family RV crashes, Sheriff Boyd Stevens and other residents rush to save them before the sun goes down.

At Colony House, Tabitha and Julie grapple with their new nightmarish reality; out in the forest, Jim, Boyd and Kristi struggle to treat Ethan's injuries; tragedy strikes from an unexpected source as a new threat arises in the town.

The Matthews family must choose which of the two settlements they will join. Meanwhile, Boyd (Harold Perrineau) is faced with an impossible decision.

Julie finds comfort in her new friends; Jim and Tabitha deal with their struggling marriage; Ethan ventures off into the forest with Victor; Father Khatri urges Boyd to embrace his role as leader; Sara receives another horrifying directive.

Boyd's plan to head off into the forest provokes an unexpected response from Kenny; Jade enlists Jim's help with an experiment; Tabitha makes a chilling discovery that sends her down a unique path searching for answers.