With only one exception, every living organism on Earth has been destroyed. Trees. Bacteria. And every single person that violinist Eden Lucas loved. She's on the knife-edge of despair when a strange train appears, hovering above the ground. What Eden hopes to find are other survivors. What she actually finds are mysteries that go to the very heart of who she is. What are the powers of the train? Who created it, and why? Eden finds she's not alone on board. Her new friends are each as damaged and lost as she is. But they're united in their mutual quest: to wrest control of the locomotive. To stop its deadly mission. Can they seize the power for themselves and find a way back to their lives? Or will they end up howling mad victims of the terrifying ghost world outside? The train won't stop rolling. All they can do is hang on for the ride of their lives. Or of their deaths.