At the old Ross Building, something is going bump in the night. Neighborhood kids are scared to go near it, and no one in their right mind would live there. The townspeople whisper about ghosts, but no one knows what really happened in the Ross Building-no one but the spirits themselves. Ten-year-old detectives Taylor and Amber know all about the place, and they also know it's haunted. One night, the ghostly vision of a girl beckons them both inside, and these two sleuths can't help but wonder: Who is the ghost girl? What happened to her? And why does she seem to want their help? Someone is keeping Taylor and Amber from the truth, and they are determined to find out who ... but they find themselves facing serious danger as they do so. Will the kids end up ghosts, too, just like the spirit girl who first took them to the old Ross Building? Or with a little snooping around-and the help of two well-informed senior citizens-will Taylor and Amber solve a century-old mystery?