Alexandre Beck is a doctor who has slowly been putting his life back together after his wife Margot was murdered by a serial killer. Eight years on, Alex is doing well, until he finds himself implicated in a double homicide, which has plenty of evidence pointing to him as the killerthough he knows nothing of the crimes. The same day, Alex receives an email that appears to be from Margot, which includes a link to a surveillance video clip that features his late wife looking alive and well. The message warns Alex that they are both being watched. He struggles to stay one step ahead of the law, while henchmen intimidate Alex's friends into telling them whatever they might know about himthe henchmen eventually kill one of them, Charlotte. In the meantime, Alex's sister Anne persuades her well-off wife Hélène to hire a respected attorney, Élisabeth Feldman, to handle Alex's case.