Lawyer Paule Lebowitz receives a devastating blow when she learns that her ex-husband, Simon Lebowitz, with whom she founded their law firm, has secretly remarried Irène, their young colleague.

Concerned that Paule will compete against her, Irène files a lawsuit to prevent her from practising under the Lebowitz name. However, as Irène and Warnier are about to sign a major contract, the client demands to work with Paule instead.

Nadia struggles to accept losing a case after her client kidnaps her own daughter. Paule comes to Nadia's aid, conducting a parallel investigation alongside the police to help resolve the situation and support her colleague.

To boost her reputation, Irène takes a bold risk by pleading self-defence for her client, an ordinary tradesman accused of killing a burglar.

Two recently released convicts arrive at the law office, demanding to see Simon. A frightened Warnier receives them, quickly realising the two parties had a prior agreement.

The distraught public prosecutor visits Paule, revealing a troubling situation. His wife discovered his secret recordings of their intimate moments and now possesses the files. He fears she might act rashly with this sensitive material.