The residents of a small, peaceful Kansas town are suddenly plunged into chaos when a nuclear mushroom cloud appears, leaving them completely isolated and wondering if they're the only ones left alive.

The Parton clan is determined to scrape together enough money to buy their beloved Mama the wedding ring she's long waited for. But a fierce blizzard threatens to demolish their dream. While the family struggles to save their beloved homestead, an important person in little Dolly's life suggests that her amazing voice and musical gifts may be destined for something far beyond Tennessee's Great Smoky Mountains.