Hannah Griffin was a girl when tragedy struck on her family's farm. She still remembers the flames reflected against 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. Two decades later Hannah is a 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...