On stone pages

In search of the truth and the salvation of the world, Hiro, Mii, and their new friends will have to descend into the underworld to stand before the Immortal Emperor—a hero of the war that ended four hundred years ago, a guardian of wisdom who clearly wants to see them... But why exactly, and what are Jack and Mira really hiding, their pasts remaining shrouded in mystery? And are their companions ready to learn their secrets?