You shouldn't joke with fate, and now you shouldn't joke with Alex either. Alex was always afraid of two things: losing herself during the Awakening and falling under the influence of the Elixir. But love has always been stronger than Fate and Aiden St. Delphi wants to go to war against the gods and Alex herself in order to get her back. The gods have killed thousands of people and can destroy entire cities in an attempt to stop Seth, prevent him from taking Alex's power and becoming the God Killer. But breaking Alex and Seth's connection is only one of the tasks. The theory that Apollyon cannot be killed has several weak points and the only person who may know how to stop the destruction has been dead for several centuries. Make your way through obstacles on the way to the Underworld, find one soul among millions and somehow It will be quite difficult to go back. Perhaps Alex can stop Seth from becoming a God Slayer... or she can become one herself.