Trickster Harry got trapped in the previous tale and since then he is at the mercy of Mab who is not at all very friendly. Mab the Queen of Air and Darkness had her own dark desires for which she needed a slave like Harry because he can get the job done at any rate. Harry left with nothing at his sleeves obeys the Queen in a robotic manner otherwise he might die again. Dying was not a bad experience for him but he is fully aware that his enemies might not let him pass to the next world this time.
Even if Harry finally gets a chance to pass to the next world it is Hell where he is going and Hades is not in got relation with him. His next mission also against Hades puts him in more trouble than ever and speaking of trouble he thinks that he carries trouble with him in the form of Nicodemus.
Mab the Queen of Air and Darkness puts Harry with Nicodemus so that they can break into the vault of Hades and take out the Holy Grail. The job is tough like Cold Days and Shadowed Souls but the biggest threat for Harry is Nicodemus who wants to kill his whole squad himself in the end.
Jim Butcher at his best this time because he keeps the main character under the shadow of the rope all the time and his every step is like a battle for survival. James Marsters’ voice was missing in the fourteenth part but know the lovely and perfect voice takes the story back on track. Harry’s allies too are in no mode of helping him all the way till the goal is achieved and looks like the wizard has to play his one last act that he has kept in the safe.