Former Chicago police officer Mary O'Reilly has been able to communicate with ghosts since having a near-death experience. In Good Tidings, "six year-old Joey Marcum seeks the help of Mary O'Reilly to find his baby brother, who was snatched during the holiday shopping frenzy of Black Friday. Mary agrees to help and finds herself investigating a child-selling scam based in Chicago. But this time, they won't get away with it because Joey's not just a big brother - he's also a ghost."