Every choice matters. The Northern Passage is all that stands between the High King and the human world. Isaac and Yara know they're running out of time. Every passing day brings the veil closer to falling and makes their enemy stronger. Desperate for answers, a mysterious message leads them farther than they've ever traveled before-to a forgotten realm in search of a being even faeries fear. But the answers they find force them to confront truths they aren't ready to face. As old enemies close in and the final full moon approaches, Isaac and Yara's mission takes them to the top of the world. Who can they can trust? Sometimes the greatest danger isn't what you fear-it's what you've always believed.