Transported mysteriously from an Arizona cave to the dying planet Mars, former Confederate officer John Carter finds himself captured by towering green nomads. Utilizing the lesser gravity of the planet, he astonishes his captors with superhuman leaps and brutal combat prowess, earning the status of a Tharkian chieftain. During his captivity, he encounters Dejah Thoris, the brilliant and beautiful princess of Helium, sparking an immediate and consuming love.
The narrative follows Carter and Dejah Thoris through perilous escapes across dead sea bottoms, harrowing encounters with brutal Warhoon hordes, and treacherous political maneuvers in the red Martian city of Zodanga. Carter navigates the unforgiving social structures of the green Martians, learning their deadly martial arts and mastering ancient technologies. He uncovers the vital secret of the Martian atmosphere plant and builds fierce, unlikely loyalties among the native fauna.
The central conflict revolves around the rescue of Dejah Thoris from forced political alliances and savage captors, driving Carter to challenge the despotic rulers of multiple worlds. As the political stability of Mars teeters on the brink of collapse, Carter rises from an isolated stranger to a central figure in inter-city warfare. The narrative builds toward a desperate struggle to save the red race from annihilation and secure a future with the woman he loves, ultimately altering the destiny of an entire planet.