After a dogfight with a German plane, U.S. Army Air Force pilot Steve Trevor crash lands on an uncharted island in the Bermuda Triangle. Paradise Island is inhabited only by women, and their existence has been kept a secret for thousands of years. Learning of the Nazi German threat to humanity, the Amazon princess Diana is chosen to accompany Trevor back to the United States to battle the Third Reich. Garbed in a skimpy red, white, and blue costume and armed with a magic lasso that forces anyone within its grasp to tell the truth, Diana uses her powers as Wonder Woman to battle the forces of evil.