Mientras investigan el asesinato de un periodista, Léa y Greg indagan en los secretos del Africa, que naufragó en 1920 frente a la costa de Les Sables d'Olonne. A bordo viajaban muchos senegaleses que regresaban a casa después de la Primera Guerra Mundial.

Daniel is a former police officer turned debt collector. Now in his late fifties, he goes about his "dirty job" without emotion or sympathy. One winter's day, he stops at a roadside parking lot and is approached by Laura, an 18-year-old young woman who asks him to drive her home. He accepts, and on the way, she offers him "her services" in exchange for money. Daniel is furious, and throws her out of his car. But his feelings of remorse and the violence of his reaction lead him to turn around and retrace his steps, only to discover that Laura has disappeared...

For years, Axel has cut off ties with his family, devastated by a tragedy for which he was made to bear responsibility. When the freighter on which he was cook stopped in his hometown, he decided to visit his mother, Françoise. It's a shock: she no longer recognizes him. Having Alzheimer's disease, Françoise now forgets whole sections of her life. Axel is the first of the siblings to disappear from his memory. Why him? What is he hiding behind this oversight? And while Ivan and Lucie have agreed to have her admitted in the center, Axel opposes it frontally and delays her departure to take care of her, despite the tensions. Between the mother and the son opens the face-to-face so long feared and yet necessary.

After being bullied for months at school, 16-year-old Jonathan douses himself with gasoline and lights a match. Now, in an induced coma, his body covered in burns, his life is on hold, his parents are in shock and the school is in turmoil.