The film tells the story of war-weary, former military captain John Carter, who is transplanted to Mars where he becomes reluctantly embroiled in a conflict of epic proportions amongst the inhabitants of the planet, including Tars Tarkas and the captivating Princess Dejah Thoris. In a world on the brink of collapse, Carter rediscovers his humanity when he realizes that the survival of Barsoom and its people rests in his hands.