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 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 the princess dons a mask and sets out to prove that she is indeed the best of them-that she alone is a Wonder Woman.