A severed hand is found in an alleyway in Boston's Chinatown. Detective Jane Rizzoli discovers the rest of the body on a nearby rooftop, the head nearly severed. The only clue Jane has is two strands of hair, but it's enough for Forensic Pathologist Maura Isles to make a startling connection. This violent attack has its roots in an unsolved murder-suicide case from nineteen years ago. The only witness, a beautiful martial arts master, has never dared to speak. And she may never get the chance...