Like so many young people at the time, 29-year-old Kayo Matsuzawa had traveled from Japan to Christchurch, New Zealand, with a dream of learning English and seeing the world. In September 1998, Kayo took her first trip to Auckland. Worried about traveling alone, Kayo invited her friend Naomi to Auckland, but when Naomi couldn’t come, Kayo promised to send her a postcard. After 10 days, there was no postcard - Naomi knew that something had happened to Kayo.