A mysterious deathbed letter launches Dr. Kate Shepherd and her husband, Bill Shepherd, on a perilous journey. Abandoning the creature comforts of Washington D.C in favor of the bare necessities of South Island, New Zealand, the Shepherds follow a series of clues that are too intriguing to ignore. The pursuits of a rare artifact and a priceless treasure are abruptly interrupted by a series of frightening natural events that quickly spiral out of control. Though sidetracked by unforeseen obstacles, the daring couple continue their hunt for the truth. Their scholarly research and clever deductions yield an extraordinary discovery.