Warning

"Like most high school seniors, Alexandra Lucas is caught between living in the moment and an unknown future. Her anxiety disorder doesn't make that any easier. But she's coping--until her train stops on the way home from a concert with her boyfriend. At first, she's worried about breaking curfew. Then terror echoes through their train car. A mysterious doorway has appeared beside the tracks, and a hologram claiming to be a human from the future shares...