Sam, a freelance journalist, decides to investigate the growing phenomenon of disaffected youth joining extremist groups. He infiltrates a group of four young people who have been tasked with the creation of a jihadist cell and whose mission is to destabilise the city centre of Paris.

Vincent Miles, a gunsmith and shooting instructor at the National Police, is an expert in combat shooting who stubbornly refuses to join a field brigade, a choice which their colleagues do not understand. When he meets Milo Cardena, a mysterious and skilled cop, his life changes in such way that he cannot ignore his true nature anymore.