Out of Barsoom's frozen north, an army descended upon a quest to plunder the red planet's greatest cities. Led by the demented Hin Abtol, they set their sights upon the proud city of Gathol. The brutal leader soon sets his sights upon the daughter of Gahan and Tara of Gathol, Llana, and soon abducts her for himself. Little does Hin Abtol realize that she is the granddaughter of the Warlord of Mars, John Carter. Along with John Carter and his ally Pan Dan Chee, she must escape the ancient, dead city of Horz and somehow find a way to defeat the massive armies of Hin Abtol which are set to conquer the planet.....