In the kingdom of Highfire, you can pack an entire house into one suitcase, grow a vegetable in a second, and have an intriguing conversation with a tree that is four times your size. If you are Aurelie Dranoir, the chosen heir to the Highfire throne, you might not find all these things as appealing as they sound.

To rule the streets, one must learn sacrifice. A smart thief surrounds himself with myth, sacrificing truth. A dangerous thief writes his name in blood, sacrificing his soul. A Thief King gives his heart to no one and lives a life of solitude. Koltin Seaward thought he was all three without sacrifice. In a city where the rich live frivolous lives and the poor barely survive there are two kings. One who earns the title by inheritance, the other paid for in blood. Koltin paid the price and earned the title to rule the underworld, but his world is about to change. To protect those he holds dearest, Koltin has to fight in order to save his family, his city and himself, but at what cost? What will he sacrifice? His heart or his soul...