Steve McGarrett was a Navy Seal tasked to head up a new crime fighting unit in Hawaii after his father was murdered by an international criminal known as Wo Fat. McGarrett's team is made up of a falsely accused bad cop, Chin Ho Kelly, a former New Jersey cop, Detective Danny Williams, and Chin's cousin Kono Kalakaua who was fresh out of the Honolulu Police Academy. The team operates with an autonomy that other police agencies on the island do not have. With the full support of the local and state governments, McGarrett and his team are able to use state-of-the-art resources to solve crimes. As they battle criminals, their personal stories are also told, including McGarrett's history with his parents and Danny's custody battle for his daughter.