When a man calling himself "the Scorpio Killer" menaces San Francisco, tough-as-nails Police Inspector "Dirty" Harry Callahan is assigned to track down the crazed psychopath.
At the opening party of a colossal San Francisco skyscraper, a massive fire breaks out due to careless building practices by the contractor, threatening to destroy the tower and everyone in it.
Showgirl Deloris Van Cartier returns as Sister Mary Clarence to teach music to a group of Catholic students whose run-down school is slated for closure.
High-tech investigations company World Securities uses Agents, called Probes, to solve various international cases, such as the retrieval of a famous diamond collection stolen by the Nazis during World War II.
