Nathan was supposed to spend the next two months with his Dad in Las Vegas. Now, that his dad's girlfriend, Leandra, is tagging along, Nathan would rather visit his grandma, Nali. She lives in a mobile home on a Navajo Reservation. Nathan is more than happy to give up electricity and running water. He can spend his time working on his science experiment. While out, Nathan gets lost in the desert alongside an injured Holy Being, the Water Monster. Can Nathan discover the source of the Water Monster's illness?