Flood Stage

On a storm-lashed night high in the Arizona mountains, safety inspector Jack Harlan drives up to audit Black Ridge Dam—a concrete giant whose reservoir, swollen with snowmelt, is riding just below flood stage.At 10:40 p.m., a team of ex–special forces operators seizes the dam. Their leader, Colonel Elias Kane, demands a ransom and threatens to open the gates at dawn—enough water to drown an entire valley: towns, a military base, tens of thousands of lives.Jack is no soldier. He's a battered, divorced engineer who knows this dam better than anyone alive. Trapped in a maze of flooding galleries, guided by the voice of a young hostage operator, he turns concrete, water, and current into weapons. But as the night wears on, one truth surfaces: the ransom is a lie. Kane means to open the gates no matter what. And somewhere downstream, Jack's daughter is asleep at the water's edge.Six hours until dawn. After that, there is no valley.