The sun burns brightly over the ancient isle of Greece as former Pinkerton spy Isabelle Webb returns for her most rousing adventure yet. Legend has it that the location of a fantastic treasure is revealed only when three mystical jewels are united. In an effort to locate the elusive trove and the power it promises, shadowy organizations and greedy men have tirelessly pursued the three hidden stones for centuries. Isabelle and her trusted companions including her dashing fiance, James Ashby are in possession of one of these legendary jewels, while nefarious treasure hunter Thaddeus Sparks retains another. The third stone, the Jewel of Hades, is rumored to be concealed on the rocky shores of Greece. As good and evil converge on this fiery island, the final battle for possession of the jewels and their anciently protected secret begins. When events take a deadly turn, Isabelle must rely on her keen instincts and indomitable spirit as dastardly forces threaten to make her first Greek expedition her last.