Two legends of science fiction and fantasy literature collide in an epic crossover event! Tarzan, the legendary Lord of the Jungle, has claimed his title as a British nobleman, but his very life is threatened when a hunting excursion among high society goes disastrously wrong. Meanwhile, John Carter, the Warlord of Mars, responds to a veiled threat from his defeated enemies. Though separated by millions of miles, these champions of Mars and Earth are drawn together by a sinister cult and manipulated into a deadly confrontation. With their lives and those of their beloved Jane and Dejah Thoris on the line, can these iconic heroes put aside their differences and survive the Thern plot...and a thousand rampaging White Apes?