From the #1 New York Times bestselling Grand Master of Adventure Clive Cussler comes a breathtaking thriller from the Numa Files series about a primitive Brazilian tribe whose secrets could save the world from the billionaire tycoon set on destroying it. 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® team discovers a murdered body&;a member of a mysterious local tribe, who live like ghosts beyond a five-part waterfall the locals call the Hand of God, and are rumored to be led by a mythical white goddess. Now they are in danger from 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 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.