Teagan Wylltson’s best friend, Abby, dreams that horrifying creatures—goblins, shape-shifters, and beings of unearthly beauty but terrible cruelty—are hunting Teagan. Abby is always coming up with crazy stuff, though, so Teagan isn’t worried. Her life isn’t in danger. In fact, it’s perfect. She’s on track for a college scholarship. She has a great job. She’s focused on school, work, and her future. No boys, no heartaches, no problems. Until Finn Mac Cumhaill arrives. Finn’s a bit on the unearthly beautiful side himself. He has a killer accent and a knee-weakening smile. And either he’s crazy or he’s been haunting Abby’s dreams, because he’s talking about goblins, too... and about being The Mac Cumhaill, born to fight all goblin-kind. Finn knows a thing or two about fighting. Which is a very good thing, because this time, Abby’s right. The goblins are coming.

The battle against goblinkind continues . . . but which side will Teagan be on? Teagan, Finn, and Aiden have made it out of Mag Mell alive, but the Dark Man’s forces are hot on their heels. Back in Chicago, Tea’s goblin cousins show up at her school, sure she will come back to Mag Mell, as goblin blood is never passive once awoken. Soon she will belong to Fear Doirich and join them. In the meantime, they are happy to entertain themselves by trying to seduce, kidnap, or kill Tea’s family and friends. Tea knows she doesn’t have much time left, and she refuses to leave Finn or her family to be tortured and killed. A wild Stormrider, born to rule and reign, is growing stronger inside her. But as long as she can hold on, she’s still Teagan Wylltson, who plans to be a veterinarian and who heals the sick and hurting. The disease that’s destroying her—that’s destroying them all—has a name: Fear Doirich. And Teagan Wylltson is not going to let him win.

“People will die.” Locked doors are opening, and uncanny creatures are tumbling through mysterious portals from Mag Mell, the world-between-worlds, into the streets of Chicago. The Dark Man has marked Aiden with a new song that’s scared him badly, and a frightening new group of sídhe is lurking nearby. Teagan knows this is war, and she must protect her family. She leaves her flesh and bones behind to join Finn in hunting the evil beings across the city. Meanwhile, their relationship is heating up—almost faster than they can control. But he is still bound to fight goblins his entire life . . . and by blood she is one of them now. Then the gateway to Mag Mell cracks open again, and the Wylltsons find themselves caught in a trap. As her loved ones begin to die, Teagan realizes that she must destroy the Dark Man and his minions once and for all in order to save those who remain . . . . . . before it is too late.