"2015. 18-year-old Boyd Montgomery returns from her grandfather's wedding to find her friend Isaac missing. Drought-ravaged central Texas has been newly inundated with rain, and flash floods across the state have begun to sweep away people, cars, and entire houses as every river breaks its banks. In the midst of the rising waters, Boyd sets out across the ravaged back country. She is determined to rescue her missing friend, and she's not alone in her quest: her neighbor Carla spots Boyd's boot prints leading away from the safety of home and follows in her path. Hours later, her mother returns to find Boyd missing, and she, too, joins the search"--Publisher marketing.