A threatening terrorist group called "The People's Revolutionary Strike Force" demand a ransom to be paid otherwise they plan to blow the city apart. While Inspector "Dirty" Harry Callahan (Clint Eastwood) is in limbo following his unorthodox method during a robbery he's sent to dispatch the terrorist group by playing their game. This time he has a new partner Inspector Kate Moore (Tyne Daly) which might prove the task to be somewhat more difficult than ever unless the two can work together.