Overview: Izzy learns the truth about the secret world of the Sidhe coexisting alongside the human one, and the angels and demons who watch over the affairs of mortals, making their own plans. She becomes a pawn in this game, and it almost costs her everything. Falling in love with a Sidhe called Jinx saves her. Only by taking matters into her own hands can she save her friends and family. Chasing a thief, sixteen year old Izzy Gregory takes a wrong turn down a Dublin alley and finds herself in Dubh Linn, the shadowy world inhabited by the Sidhe which exists like a double-exposed image alongside our own. Helped by the hot, tattooed, belligerent Jinx, she escapes and thinks her adventure is over. At home, however, shadows appear out of the corner of her eye, things which can't possibly be there. Not to mention the tattoo which suddenly appears on her neck.
Jinx is a C Sidhe, a shapeshifter serving the vindictive Aes Sidhe leader, Holly. She commands him to find the spark of a fallen angel in the city--a spark which has attached itself to Izzy. Just his luck. Angels and demons seek it too. He can only hope to hide her from them. He certainly couldn't protect her if found. When Jinx finds Izzy again, she grills him for answers, following him through the maze of the narrow, lost bits of Dublin, the ratty, forgotten corners that wind in and out of the modern city. She saves his life, binding him to her like a slave because of the curse he carries--that no hand but his own will save him.
He can't escape her, can't refuse her, but knows that if his matriarch Holly gives the order, he'll still have to kill her. Twisted rules such as these govern every Sidhe. He lets her go, hoping against hope it's the last he'll see of her, knowing it can't be that easy. Izzy's return to the real world doesn't stop the danger, instead drawing in her friends, Marianne and Dylan, and her parents. With her father in a coma after a suspicious traffic accident, she discovers that her parents know more about Dubh Linn than they should. And her father has a tattoo identical to her own. The spark in Izzy grows stronger, revealing itself to be the fallen angel, Sorath, who has her own plans for Izzy, and the world. To save her father, and to save herself and Jinx from the sadistic Holly, Izzy makes an alliance with the angel which takes them deep into the Sidhe council's lairs, and unravels secrets long harboured.
Dylan falls under the spell of Silver, a Leann Sidhe who offers him seven years of musical success in return for his youth and creative strength. And Marianne pays with her life. Not the least of those secrets is Izzy's own identity--a Grigori, one of the watchers, forged of angel, human, sidhe and demon blood. Sorath plans to use Izzy, Jinx and Dylan to release her lover Lucifer and burn the world in unholy fire. It takes the courage of all three, and Izzy's extraordinary bloodline, to stop Armageddon and save her father's life. She is a thing that should not be, outside the divine plan, a crack in everything, and by accepting that, she can save them all. It is the reason she was created.