Oliver has spent years looking for a way back into the Labyrinth. Officially, he's a blood magician, trained to defend humanity against the Labyrinth--a sentient universe full of monsters. Unofficially, Oliver has been cast out of the order. All for loving a man who could never love him back. All for trying to save him.
When he discovers Thea, a working high school drop out in rural Appalachia, he instantly recognizes the symbol on Thea's wrist--she's descended from monsters, and she'll be able to follow their trail. Back to his magic. Back to his love. But Thea has been living as a normal girl with no knowledge of magic or her monstrous heritage. She's not going to help Oliver re-seal the Labyrinth and kill monsters unless she can get something out of it. Saving her small town is a noble enough cause, but once underground The Labyrinth tempts her with everything she's always wanted: money, stability, and power. All she needs to do is set the Labyrinth free.