In the fourth and final book of the Dragonslayer series, Mandulane's army is poised to attack the Northlands in the name of a powerful god, but in truth Mandulane is using the act of spreading this new faith as a way to disguise his own personal greed and hunger for power. Astrid has succeeded in warning her beloved country of imminent danger, and the Northlanders scramble to set up a clever defense, never realizing a spy in their midst is poised to take critical information directly to Mandulane. After sacrificing herself in order to set her brother Drageen free for the sake of protecting the Northlands, Astrid finds herself controlled by the stone of light. Although it forces her path of destiny, Astrid learns she must make one final choice about who she wants to be. Most important of all, her new sweetheart Trep encounters a dragon that entrusts him with the care of a dragon's egg. Trep embraces a dangerous journey and accepts the duty of protecting the unhatched dragon, knowing that its safety could impact the fate of the entire world.