"It's been 925 summers since the Jemen introduced zyme, a bioluminescent algae, into the world's ocean and unwittingly triggered an Ice Age that has consumed most of the planet. All but a handful of Jemen flew to the stars, but before they left, they recreated several extinct species that had thrived in the last Ice Age. After almost a thousand summers, the archaic hominins that struggle along the edges of massive glaciers are dwindling. All they...

In the brutal Ice Age caused by the ancient Jemen war, many archaic human species, including Denisovans and Homo erectus, hover on the verge of extinction. There seems no way out, until the greatest Neanderthal holy man, Trogon, has a vision. Legends say the truce that ended the old war left one hostage in the hands of the victorious rebels: the god-like Jemen leader, known as the Old Woman of the Mountain. According to Trogon's vision, only one person...