Dead birds raining from the sky. Poison in the water supply. Spies on the back porch. A lifeless crow shatters the windshield as Rita Avery, her daughter-in-law, and her granddaughter arrive at Arizona's Rim Vista Park. Rita dodges bird carcasses on the road home, where she finds her husband Cliff and son Travis gravely ill from a mysterious pathogen with no cure. The CDC assembles a team to create a cure, but Rita doubts it will arrive in time to...