In Chester's Mill, a mysterious dome suddenly encapsulates the town, isolating its residents. As chaos ensues, former Army veteran Barbie encounters journalist Julia Shumway, who seeks to uncover the truth. The local sheriff, Duke Perkins, struggles to maintain order amidst rising tensions. Meanwhile, Big Jim Rennie aims to control the situation for his own gain. The episode sets the stage for a gripping exploration of human nature under pressure.