When a fighter jet crashes on Paradise Island, young Princess Diana asks her mother, Queen Hippolyta, for permission to enter the world of mortals. The queen thinks Diana's request is a good one. She holds a special competition, a test of skill and bravery, to determine which Amazonian will be permitted to go. But Diana, as a royal princess, is denied from entering the trials! Against her mother's wishes, and behind the disguise of a mask, the princess sets out to prove the she is indeed the best of them that she alone is a Wonder Woman.