Steve McGarrett is a former navy seal after his father death and his finance is put into the hospital he goes back to Hawaii to avenge his father death and the attempt murder of his finance what happens when he is offer to take a job as head of a task force by the governor with full immunity, means and with his finance by his side? 23 year old Jennifer Jareau Rollins is the younger sister of Catherine Rollins and is old former navy seal and now is a FBI agent with a medical degree before she join the navy what happens when she is put into the hospital and her finance comes back home?