"Paris, Christmastime. After a heart attack, former police captain Mathias Taillefer wakes up in hospital with a stranger at his bedside. The mysterious girl, Louise Collange, is a volunteer who plays the cello for the patients. When she finds out that Mathias used to be a cop, Louise asks him to look into a peculiar case. Her mother, once a dancer at the Paris Opera Ballet, died after falling from her balcony, and Louise believes she was pushed. Though skeptical at first, Mathias agrees to help her, launching them both headfirst into a deadly chain of events. At the center of it all, a woman named Angâelique, whose intentions may not be as innocent as they seem"--