Wonder Woman befriends the princess of Kasnia, a jet-setting party girl who is reluctant to end her wild ways in order to get married. Unfortunately, her fiancé is the immortal Vandal Savage, and he already has plans for both the throne and the Justice League. It is up to Wonder Woman and Batman to stop Savage while Flash, Green Lantern and Jonn Jonzz go to take out Savage's new Rail Gun satellite.