Drawing on the survival skills imparted by his father, Garrett discovers an old Ham Radio that connects them to a distant, struggling society. His father's foresight proves invaluable when he uncovers a hidden bunker filled with weapons and supplies, alongside a foreboding letter that warns of impending threats. The arrival of Andie's sister, Charlie, and her family prompts the relatives to band together, fortifying their ranch against the threats of a world in disarray. As they confront the harsh realities of survival, they must rely on a tight circle of people to share their resilience and the bonds forged through shared knowledge, navigating a landscape irrevocably altered by chaos.