The series follows the story of Steve McGarrett, a former Navy SEAL who returns to Hawaii to investigate his father's murder. He is soon recruited by the governor to lead a special task force to combat crime on the island. With the help of his team, which includes a detective, a former protege, and a skilled hacker, McGarrett uses his military expertise to take on Hawaii's toughest criminals and solve complex cases. An ex-Navy SEAL returns from Afghanistan and uses his military skills to become a private investigator in Hawaii.