A little girl and her mother are killed by a creature posing as an old woman after the girl lets it into their home. Meanwhile, the Matthews family—Jim, Tabitha, and their children Julie and Ethan—are on a cross-country RV trip when they encounter a fallen tree blocking the road. Forced to detour, they enter a small town where the local sheriff, Boyd, tells them to follow the road. As they drive, they repeatedly loop back into the town, unable to leave. Eventually, another car collides with them