After Sacoridia's victory over Second Empire, Karigan G'ladheon's life as a Green Rider should have settled into an ordinary routine. But her father's abrupt departure to rescue Laren Mapstone, leader of the Green Riders and the woman he loves, from the far distant land of Varos, has left Clan G'ladheon's business in disarray and Karigan's hands full. Even as Karigan tries to sort out the clan's mess, a darker, more perilous crisis casts its shadows over her: Mornhavon the Black has reawakened. Moreover, he has freed two undead wraiths from their imprisoning tombs to hunt Karigan down and bring her to him in Blackveil Forest. In a deadly confrontation with one of the wraiths amid the frivolity of the Harvest Ball, Karigan is left vulnerable to the intrigues of another old adversary she thought destroyed long ago. Haunted by the unceasing rhythm of the dance, she falls endlessly through the frigid dark of the heavens, and even Westrion, god of death, cannot save her. King Zachary, bereft and hopeless, keeps vigil for her safe return. If they are not reunited, her loss may destroy him - and any chance Sacoridia has of overcoming Mornhavon's dark designs.