Imagine Christmas in Paris and an uneasy feeling that something is very wrong in the case you are investigating. Chief of Police Nico Sirsky returns to work after recovering from a gunshot wound. He's in love and rearing to go. His first day back has him overseeing a jewel heist sting and taking on an odd investigation. Dental students discovered a message in the tooth of a severed head. Is it a sick joke?
There's no rest for Paris's top criminal investigation division, La Crim'. Who is preying on women in the French capital? How can he kill again and again without leaving any clues? A serial killer is taking pleasure in a macabre ritual that leaves the police on tenterhooks. Chief of Police Nico Sirsky - a super cop with a modern-day real life, including an ex-wife, a teenage son and a budding love story - races against the clock to solve the murders as they get closer and closer to his inner circle. Will he resist the pressure?
When a major Parisian modern art event gets unexpected attention on live TV, Chief of Police Nico Sirsky and his team of elite crime fighters rush to La Villette park and museum complex. There, renowned artist Samuel Cassian is inaugurating the first archeological dig of modern art, 27 years after burying the leftovers of a banquet. In front of reporters from around the world, excavators uncover a skeleton. Could it be the artist's own son?