Diana (Gal Gadot), princess of the Amazons, has been trained to be an unconquerable warrior on her closely guarded Amazon homeland of Paradise Island. When an American plane crashes on the shores of the island and the pilot reveals that there's a massive conflict taking place, Diana decides she has to step in to help.

She travels to the outside world to help stop the war to end all wars, in the process becoming the superheroine Wonder Woman.