In the desert, water means life. In the Valley of Two Rivers, the canals have allowed countless generations to farm this harsh land. Too much water, however, can mean death. After winter floods destroy the canals, the farming clans of Serpentgate fear that their last days have come-the time of desperation and division spoken of in the Prophecy of the Rainbow Knife. Mysterious deaths, accusations of witchcraft, and a clash between rain priests and...