For fans of the Halcyon Trilogy, a new dark odyssey begins: In the exotic land of Marrakesh, Omar Bakhoum joins an airship expedition into the freezing north in search of a fabled country called Ysland, but howling ice storms, legions of ghosts, and a deadly samurai stand between Omar and his goal. His journey has barely begun before the members of the expedition team begin dying, and as the last remaining foreigner on board, Omar is accused of the murders. The one thing that can help him find the real killer is Omar's ancient sword, haunted by the souls of thousands of dead sages and warriors. But this sword may be the very thing that dooms the entire expedition to a watery grave.