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...

When a ten-year-old girls mutilated body is found in a public park in Paris, chief of police Nico Sirsky takes action. But his elite team of homicide detectives isnt on the case for even twenty-four hours before a second child is found in a middle-school classroom. With the City of Light on edge, the clock starts ticking for Sirsky to catch the killer who calls himself the Gamemaster.