In an old hospital in the dregs of Pittsburgh, the nursery floor is coated with green linoleum. As she walks down the long ward, author and crime scene investigator Deborah LeBlanc walks the longest Green Mile imaginable. Why does she hear the sounds of children laughing and babies crying, doors creaking, and the clanking of medical equipment instruments in the birthing area? What, exactly, happened in that hospital, in the distant past?