In a fragmenting United States, the cities of Phoenix and Las Vegas skirmish for a dwindling share of the Colorado River. But it is the Las Vegas water knives - assassins, terrorists and spies - who are legendary for protecting Las Vegas' water supplies, and for ensuring Phoenix's ruin.When rumours of a game-changing water source surface, Las Vegas dispatches elite water knife Angel Velasquez to Phoenix to investigate. There, he discovers hardened journalist Lucy Monroe, who holds the secret to the water source Angel seeks. But Angel isn't the only one hunting for water, Lucy is no pushover, and the death of a despised water knife is a small price to pay in return for the life-giving flow of a river.

    Lonely and isolated, he's turned his "special trick" into a lucrative career as an assassin. He thinks he's one of a kind - until one day he's confronted by a young girl named Cassandra, who tells him that he's not alone. She has it too, and the two of them are not the only carriers ofSensory Deprivation Syndrome (SDS)SDS is a medical condition so dangerous that carriers can render anyone they touch blind or deaf, or otherwise senseless, in seconds.Fearing discovery, Luxley follows Cassandra through a dark underground network of "Deprivers" in a desperate hunt for her missing brother Nicholas, taken hostage by a radical group of carriers with a terrifying agenda. Luxley doesn't know who to trust, or who is safe to touch, but he needs to learn Cassandra's secrets fast. As knowledge of SDS spreads, and panic erupts, no Depriver anywhere in the world will be safe.