John Carter, a former Confederate soldier, is mysteriously transported to Mars, known as Barsoom. There, he discovers a planet on the brink of war between various factions. With his newfound strength and agility in Mars' lower gravity, Carter becomes embroiled in the conflicts, caught between the warring cities of Helium and Zodanga. Along the way, he encounters strange creatures and falls in love with Dejah Thoris, a princess. Carter must navigate the treacherous politics of Barsoom while striving to protect his newfound home and the woman he loves.