California is naturally one of the driest places in North America, but how did it become the largest agricultural supplier on the continent? A mind boggling system of dams, reservoirs and diversion schemes move water around vast distances, even from outside the State. The Water Brothers reveal how climate change, drought, flooding and over-pumped aquifers have combined to put the entire water management system at risk. And like in many other regions with water in all the wrong places, the pressure is always on to find clever and sustainable solutions.