In 1984, Diana Prince, also known as Wonder Woman, works as a senior anthropologist at the Smithsonian Institute in Washington, D.C. She meets Barbara, who idolizes her. They both unknowingly use an ancient artifact to fulfill their desires. A businessman named Maxwell Lord covets the artifact's power and becomes a powerful figure, triggering chaos and conflict. Diana and Barbara must find a way to reverse the effects and prevent a nuclear war. With the help of Steve Trevor, Diana renounces her wish and saves the world.

Diana, an Amazonian warrior princess, discovers her true powers when she leaves her secluded island paradise to fight alongside men in a war to end all wars. She becomes Wonder Woman, a hero who is determined to bring peace to the world.