Erratath is both a place of amazing amusement and despairing deaths. Once the clock strikes midnight, the Assassins of Mistorne prey on their victims. Brynn is a part of Mistorne's assassins guild, efficiently killing off targets from around the world. One day, she gets a contract that requires her to go to the capital of Erratath: Waekbourne. One of the newer recruits, Aspen, is allowed to tag along with her during her journey to the capital. During their adventure, they find themselves deep in the heart of Weakbourne. The two of them soon realize that they had entered a world of magic and betrayal.