In 1975, a new group of Peace Corps volunteers landed on the island nation of Tonga. Among them was Deborah Gardner -- a beautiful twenty-three-year-old who, in the following year, would be stabbed twenty-two times and left for dead inside her hut.

Another volunteer turned himself in to the Tongan police, and many of the other Americans were sure he had committed the crime. But with the aid of the State Department, he returned home a free man. Although the story was kept quiet in the United States, Deb Gardner's death and the outlandish aftermath took on legendary proportions in...