An early description from HBO said the story "chronicles the world's descent from the golden Age of Heroes into its darkest hour. And only one thing is for sure: From the horrifying secrets of Westeros's history to the true origin of the White Walkers, the mysteries of the East, to the Starks of legend . . . it's not the story we think we know." OK, so, wow. Things are really about to get real in prehistoric Westeros.