On the mystical island of Themyscira, home to a race of warrior women known as the Amazons, Princess Diana yearns for a life beyond her sheltered existence. When an American pilot named Steve Trevor crash-lands on the island, Diana gets her chance. Steve informs the Amazons of Ares' escape, the god of war, who poses a colossal threat to mankind. Defying her mother Queen Hippolyta's wishes, Diana arms herself with magical weapons, including a lasso of truth and an indestructible tiara, and joins Steve to stop Ares.

As Diana navigates the modern world, she is baffled by its complexities and inequalities but remains determined in her mission. She and Steve trace Ares' influence to planned military conflicts and specific individuals under his control. Diana’s physical prowess and combat skills prove invaluable as they encounter a series of challenges and foes. Alongside Steve, she battles various forces attempting to unleash chaos on the world. Each encounter brings Diana closer to understanding her destiny and the true nature of her powers.