After escaping Reach, Kaiya is yet again thrown onto another trail. This time she's determined to find out more about herself. Discover her place in this war-torn galaxy. Old friends will reunite. Love will be discovered in an unlikely person...or persons. An ancient evil emerges.

Kaiya Walker was just your average cowgirl who enjoyed the nice things in life. Even with the Human-Covenant War raging on through the universe, she was content on her planet. That is until one day while on a trail ride with her friends, they came across a large unusual door. Once those doors open, Kaiya's life is turned upside and she's hurled into an unknown trail.