North Korea is a country located in Asia, however, unlike the rest of the world, it is completely cut off from all outside contact. It is in perpetual conflict with the other Korea, South Korea. Lieutenant Commander Steve McGarrett went to North Korea to help Agent Jenna Kaye to find her fiancee, only to discover that she was actually working for crime boss, Wo Fat.
Steve was eventually captured and tortured for information relating to "Shelburne". Kaye, who had discovered that her fiancee was actually dead, was later shot dead by Wo Fat, but not before she helped aid in Steve's escape.
Thankfully, Steve's colleagues; Detective Danny Williams, Lieutenant Chin Ho Kelly, Officer Kono Kalakaua, and Steve's mentor, Joe White. A Navy SEAL team managed to get to North Korea to save Steve, and bring him back to Hawaii although Wo Fat later escaped.