An ex-cop, now working as a hack novelist, is called out of retirement to help investigate a string of deaths that appear to be the work of a serial killer but soon are revealed to be the work of the Syngenor - the synthesized genetic organism!。While Gilou awaits his trial in prison, Laure's group is being sidelined. They do their utmost to be given one case in particular: that of the murder of an unaccompanied Moroccan minor in Paris's Barbès district.。