When a vicious night terror lords over the waking world and the dream world, his greatest weapon, a winged assassin born of a nightmare, will have her vengeance.
Wren has spent her life doing the bidding of her cruel creator Para Warwick in the dream world known as the Reverie. When she learns of a weapon with the power to destroy him, she jumps at the chance to steal it. Her plan goes awry and she finds herself in the clutches of the rebellion and the rogue Alaric, a nightmare himself with twisted horns and dark magic. When a plea from a strange being known as a dreambreaker reaches them, the two 'mares find themselves thrown together in a desperate mission to save her before time runs out. 
Meanwhile in the waking world, Caine Fallon, son of King Warwick and Prince of Wolfhelm, prepares to wed Ila Enevoldson, the young queen from the wild kingdom of Galesborough. But Ila is more than a queen. She is a weaver, a protector of the ancient Boundary that separates the Reverie and the Wake. Three nights before their wedding, Caine catches Ila in the act of opening a portal to the dream world and follows her, landing himself in a universe stranger than he could have imagined-a realm where his father is more monstrous than he ever could have fathomed.
Now, the fates of four strangers will become intricately entwined, and the fate of their worlds will be sewn by their choices.