On the last ordinary day of her life, Abby Bennett feels like the luckiest woman alive. But everyone knows that luck doesn't last forever. As her husband, Nick, and daughter, Lindsey, embark on a weekend camping trip to the Texas Hill Country, Abby looks forward to having some quiet time to herself. She braids Lindsey's hair, reminds Nick to drive safely and kisses them both goodbye. For a brief moment, Abby thinks she has it all-- a perfect marriage, a perfect life --until a devastating storm rips through the region, and her family vanishes without a trace...