This book is about a girl named Allie who is fossil hunting when she hears a ghost's voice that saves her life. But after that the ghost keeps in contact with her. The ghost needs Allie to figure something out and to stop something from happening. Allie just needs to do it before it is too late.
Allie Nichols is being pursued by a ghost. Her friend Karen calls Allie a liar and doesn't want to hear "stuff like that." But her old pal, Dub, listens eagerly as Allie tells him about the voice that guides her down a steep cliff side, the girl she imagines who begs, "Help me," and a terrible nightmare in which that girl falls to her death. Who is the girl? Is she the ghost? And what does the ghost want from Allie?