In the murky shadows of an alley lies a females severed hand. On the tenement rooftop above is the corpse belonging to that hand, a red-haired woman dressed all in black, the body nearly decapitated. Two strands of silver hairnot humancling to her body. They are Rizzolis only clues, but theyre enough for her and medical examiner Maura Isles to make a startling discovery: This violent death had a chilling prequel.Nineteen years earlier, a horrifying murder-suicide in a Chinatown restaurant left five people dead. One woman connected to that massacre is still alive: a mysterious martial arts master who knows a secret she dares not tell, a secret that lives and breathes in the shadows of Chinatown. A secret that may not even be human. Now shes the target of someone, or something, deeply and relentlessly evil.Cracking a crime resonating with bone-chilling echoes of an ancient Chinese legend, Rizzoli and Isles must outwit an unseen enemy with centuries of cunningand a swift, avenging blade.