An investigation into the sudden deaths of a pod of gray whales leads National Underwater & Marine Agency leader Kurt Austin to the Mexican coast, where someone tries to put him and his mini-sub permanently out of commission. Meanwhile, in South America's lush hills, a specially assigned NUMA(R) team discovers the body of a murder victim--a member of a mysterious local tribe that lives beyond a five-part waterfall the locals call the Hand of God and is rumored to be led by a mythical white goddess. It becomes clear that the tribe is the target of a vicious cadre of bio-pirates intent on stealing medicinal discoveries worth millions.

Soon, Austin and his crew realize that they're working opposite ends of the same grand scheme, and they must race against time to save the world's freshwater supply from a twisted eco-extortionist. But every step toward salvation takes them deeper into a dense jungle of treachery, blackmail, and death.