In 1973, artist Jennifer Spencer and her sister, Beth, are
gang raped; the attack leaves Beth in a
catatonic state. Ten years later, Spencer uses a
.38 Special to kill George Wilburn, one of the rapists, in
San Francisco and returns to her hometown of San Paulo, looking for the remaining criminals. Meanwhile, Inspector
Harry Callahan is frustrated when another judge dismisses a case due to his direct methods. At his favorite diner, Callahan foils a robbery, killing three criminals in the process. He later causes local crime lord Threlkis to suffer a fatal
heart attack after personally insulting him in front of his family at his daughter's wedding. Unable to fire him because his methods "get results", Callahan's superiors instead order him to take a vacation. Four of Threlkis' hitmen eventually attack him. Callahan takes down three, while the fourth escapes. Later, the suspect from the dismissed case and his friends throw
Molotov cocktails into Callahan's car. Acting in
self-defense, he kills his attackers. To get Harry out of sight until the furor dies down, Callahan is sent to San Paulo. Upon arrival, Callahan chases down a robber. The reckless but successful pursuit angers the San Paulo police. While jogging with his
bulldog, Meathead (a gift from SFPD colleague, Horace), Callahan accidentally runs into Spencer. On returning to his room at a motel, he is targeted by the surviving Threlkis hitman, who is killed by Callahan. Meanwhile, Spencer kills Kruger, a second rapist. Callahan recognizes the
modus operandi, but Lester Jannings, San Paulo's police chief, refuses to work with him. Callahan learns both victims are friends of Jannings' son, Alby. Ray Parkins, the female member of the gang of rapists, figures out they are being targeted, and warns two of the remaining men, Tyrone and Mick. At an outdoor cafe, Callahan meets Spencer again. Over drinks, he learns that she shares his emphasis on results over methods when seeking justice, to a point, but he adds the caveat "'til it breaks the law." Callahan reveals that he is investigating Wilburn's murder, which rattles Spencer. Later, he finds Tyrone dead. To be more protected, Mick stays with Parkins at her place. While visiting them for questioning, Mick attacks Callahan. After Callahan subdues Mick and takes him to the police station, Spencer guns down Parkins. Callahan and Spencer meet again and sleep together. On his way back to the motel, Callahan notices her car, which he had seen earlier at Parkins' place. Returning there, he finds Parkins' body. Two of Mick's friends bail him out of jail. Meanwhile, Callahan's partner Horace arrives at the motel to celebrate the easing of tensions in San Francisco. He meets Mick and his henchmen, instead, who have been waiting to spring an ambush. Mick's gang kills Horace and
neuters Meathead with a
switchblade. They then beat up Callahan before throwing him off a pier, presuming he will drown. Spencer arrives at the Jannings home with the intention of killing Alby, another one of the rapists. To her surprise, Alby, like her sister, is catatonic; a guilty conscience caused him to attempt suicide, which left him with permanent
brain damage. To protect his own reputation and his only child, Jannings refused to jail the guilty parties. He convinces Spencer to spare Alby's life and promises Mick will be punished. Mick and his henchmen, however, arrive and capture Spencer, using her gun to kill Jannings. Enraged at what happened to Horace and Meathead, Callahan goes after Mick's gang with his
.44 Automag. The gang brings Spencer to the boardwalk for another rape but are startled by Callahan's apparent return from the dead. Callahan chases Mick after killing his henchmen. Mick drags Spencer to the top of a
roller coaster, where she breaks free. Callahan shoots Mick, who falls from the top of the coaster, crashes through the glass roof of the
carousel below, and is impaled on the horn of its unicorn. As the local cops deal with the crime scene, Spencer asks Harry, "what happens now?" Before he can answer, she goes on an angry tirade, talking about
rights and
justice, saying Harry will never understand. A policeman informs Harry they've found a .38 on Mick.
Ballistics, Callahan replies, will prove that "
his gun … was used in all the killings," telling the cop that, "it's over." Callahan and Spencer leave the crime scene together. ==Cast==