In 1995, four student friends formed a band. Upon returning from a party, they discover the body of a young waitress of 19 years at the edge of a road. The young woman died in their arms. Commissioner suspect the four boys but can not prove it. None of them admit ... Fifteen years later, on the anniversary of the death of the young waitress, one of four men killed by a bomb hidden in his apartment ...

The Dinard resort prepares for a British film festival when the body of a director is discovered floating. He had been the victim of a shipwreck in which his sister had died. Are these two events linked?

The story of a busy man, who fills his time travelling to Africa, South America and the Middle East. His passion for his job has distanced him from his loved ones. He’s been divorced for three years and has since seen his son very little. When the latter disappears, he is forced to stand still, and soon discovers things about his ex-wife and, above all, his son. A terrible feeling of guilt overwhelms him and he decides to find his son at all costs...

A murder case rocks a small town when Julien Monnier is found dead, stabbed near the cave dwellings known as "Les grottes du Régulus." An old book is found beside him. Grace, a police captain, is put in charge of the investigation and discovers similarities with a ten-year-old case: a 17-year-old girl, Sarah, had been found dead, also stabbed, in the same caves. Grâce calls on Alex, her childhood friend who has become an expert in old books. He had investigated Sarah's death when he was a police officer. Alex reluctantly revisits the past and agrees to help, partly to reconnect with Grâce, his lost love. Their reunion rekindles old feelings and painful memories linked to their separation. As the investigation progresses, the memories of the protagonists and suspects become intertwined. Grace and Alex relive their past, but are confronted with conflicting memories and unspoken words.

Two brothers lead the investigation into the murder of the heir of a large estate.