A young journalist in London becomes obsessed with a series of letters she discovers that recounts an intense star-crossed love affair from the 1960s.

Diana, princess of the Amazons, trained to be an unconquerable warrior. Raised on a sheltered island paradise, when a pilot crashes on their shores and tells of a massive conflict raging in the outside world, Diana leaves her home, convinced she can stop the threat. Fighting alongside man in a war to end all wars, Diana will discover her full powers and her true destiny.