Steve McGarrett, the head of a task force in Hawaii, decides to return home to Oahu to avenge the murder of his father. The task force is granted full immunity and means to fight crimes.
The elite federalized task force Five-0 resumes their mission of investigating crimes in Hawaii, including the hijacking of a drone and the kidnapping of the daughter of a Navy SEAL.
The Five-O team investigates bizarre crimes in Hawaii as a mystery sends them hunting for a pirate's treasure.
After his friend gets murdered; CIA Agent Steve puts himself out to be kidnapped by the gang he believes responsible for his friend’s murder to get among them and find out the killer.