Florence Varthy is found dead in her garage. Witnesses to her last few days are questioned to discover who wanted her dead. How did this woman, only daughter of well-known, brash businessman Jacques Varthy, end up like this?

While she was jogging Lisa Campion , the daughter of the retired police officer Fabio Campion , discovered the frozen corpse of Julien , a child who disappeared 20 years ago.The police officer Simon Beauregard is then sent to Roches Noires , a village of the Tarentaise Valley, for the criminal investigation.

Remedios Buendía defends her homeland and will fight for it. This fateful day of 1945, a group of maquis take the post where she tries on her wedding dress. She will show how far she can go defending her values.

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.