Hannah Griffin was a girl when tragedy struck on her family's farm. She still remembers the flames reflected againt the newly fallen snow and the bodies the police dug up--one of them her mother's. It was the nation's worst murder scene in decades and the killer was never found...Twenty years later Hannah is a talented CSI investigating a case of child abuse when the past comes hurtling back. Years of buried questions are brought to life. A killer with unfinished business is on the hunt. And an anonymous message turns Hannah's blood cold: Your Mom called.