This film is the third installment in the "Dirty Harry" series. Harry (Clint Eastwood) has a new partner, Kate (Tyne Deley), a female police officer transferred from the Personnel Records Bureau, and the two of them are tasked with tracking down a group of terrorists who dare to extort two million dollars from the San Francisco City government. However, Harry, who has always gone his own way, kicks the nail on the head, and his new partner Kate is quite unimpressed by his tough-guy style, and the two partners must resolve their differences before they can work together to catch the lawless terrorists.