John Carter has freed Mars from Issus, the false goddess whose tyranny once
ruled the entire planet... but at a great personal cost. Dejah Thoris, his
beloved princess, was taken by Matai Shang, a renegade priest determined to
avenge the planet's shattered religion. Activating a doomsday device to destroy
the fragile Martian atmosphere, Shang flees into the unknown regions of the
north. Carter, aided by his son Carthoris and trusted alien pet Woola, must
unite the many races of Mars - despite the ages of distrust and open
warfare among them - for the singular purpose of averting Judgment
Day!