Captain Franck Guerin of the Brigade Criminelle was about to learn a lot more about ballet than he ever expected or wanted to know. Sophie Duval was a leading dancer with the Paris Opera Ballet – an etoile – and she was murdered in her home. A chord had been wrapped three times around her neck and then she had been strangled, but why? It seemed simple to rule out professional jealousy and she seemed to have little life outside of the ballet. The Opera Ballet is a tight-knit and dedicated world, but it's not long before it's a world of terror, because Sophie Duval is only the first person to die.