Harry Dresden, the only professional wizard in Chicago, is close to the black strip of his life... For as Winter Knight of the Queen of Air and Darkness, Harry never knows what Mab's intrigues might turn out for him. This is usually a problem.. He doesn't know half of it... Mab simply traded Harry's skills to pay off one of her debts. And now he is obliged to help a group of supernatural villains, led by one of Harry's most terrible and despicable enemies - Nicodemus Archleone, break into the most protected place in the city to gain access to the most protected place in the Unprecedented. This is a raid for the return of the Holy Grail itself from the vaults of the greatest storehouse of values of the supernatural world belonging to Hades himself - the lord of the fucking Underworld and an unpleasant personality in general. Even worse, Dresden suspects that there is another game going on in parallel, which no one mentions. And he is also sure to death that Nicodemus does not intend to release any witnesses from his team alive .. Especially Harry . Dresden has always been able to get out, but he will have to play a treacherous game in order to survive this bout - unless his own allies kill him before his enemies do...