Anna, an adopted child, has always wondered who her real parents are. When Anna and her family check into a strange old hotel, Anna meets the ghostly Colonel and Mrs. Terwilliger. Her resemblance to the couple's missing daughter is eerie - especially since the young girl disappeared over one hundred and forty years ago! Unable to resist the lure of the past, Anna is drawn back in time to the danger-filled days of the Underground Railroad, which helped runaway slaves to freedom. Here Anna discovers the mystery of her childhood - a mystery that must be solved if Anna is ever to find her way home again.