Grace Graham is back in Tennessee with her four-year-old son on a short unpaid leave from work, helping her father recover from surgery and spending time with her sister. Shoal Creek seems more backward than ever after her years in California, and it's hard to find organic food anywhere. When the unthinkable happens and her son is diagnosed with measles, Grace's fears over modern medicine take a dangerous turn. Worse, the town has fallen into quarantine and its residents focus their anger and blame on Grace. She is alone and scared, until one brave woman chooses to reach out a hand of forgiveness and mercy. But when the outbreak takes a life-threatening turn, will Grace be able to forgive herself?