High school senior Lydia Hawthorne is less than grateful when Oberon has her snatched from the Mortal world and she finds out she's actually Fae. And not just any Fae, but a trueborn with enough inherent magic to tip the balance between Oberon and Titania's warring Bright and Shadow courts. But that's their game and she doesn't want to play by their rules. Together with Clive Barrow, a Bright Court Fae with embarrassing family ties to the Mortal world, Lydia fights to regain her old life, fueling her magic with the very Human power of love and loss, challenging the essential nature of Faerie itself.

Only months after her victory over Oberon and Titania, everything Lydia thought she'd accomplished is Faerie is falling into decay, the Fae are restless, and Taylor—the baby sister she sacrificed everything for—has grown up without her. When Taylor tumbles out of the ordinary world and into Faerie, she discovers that Aeon, her imaginary childhood friend, is all too real. He is a powerful Fae, trapped in a maze of vengeance, memory, and madness. His unleashed power threatens to free Oberon and Titania and reignite the war Lydia ended. The sisters, now nearly strangers to one another, must figure out how to keep Aeon from destroying Faerie while safeguarding the mortal world, all without sacrificing the Fae who was once friend to them both.