While Lucie discovers the scale of the manipulations of the municipality, orchestrated by Simoni and Eva, Frank is appointed police chief by Simoni promising to "collaborate" with him.

Lucie is willing to infiltrate the rebels' camp pretending to be a dissenter who wants to join their cause. She finally discovers that they aren't dangerous terrorists but rather nice protesters who are very poorly organized.

Frank and Lucie's investigation of Jean Lanvin's death makes progress. One lead takes them to Le Chéri, the swingers club in the city where everyone is dressed. The two policemen infiltrate the establishment and they discover in the middle of the party-goers a way which could bring them up to the rebels.

Miraculously saved, Frank is taken in hand by Fanny, a psychoanalyst with radical methods that forces him to confront himself, on his own and in his nakedness. After a hard start, Frank will gradually understand the true meaning of transparency and also fall in love with his shrink.

Finding himself as an investigator, more in line with his skills, Frank tries to advance the Lanvin case on several tracks. However his daily life in the world of nudity and transparency is difficult.

Frank returns to the police but is now reduced to secretarial duties under the orders of Lucie who has risen in rank. He takes his return very badly as his colleagues don't stop making fun of him.

While the assassination of Jean Lanvin upsets the whole community, Frank returns to live with his parents but he cannot adapt to the new law. He stays fully dressed and does not want to go out. Serge and Nathalie, his parents, organize a barbecue to help him.

July 13, 2022. The friends and colleagues of Frank, Lucie, Kamel, Pujol, Corine meet at Lucie's place to celebrate the passage to The Transparency Law. This is an opportunity to discover how everyone will cope with this transition that terrible moment where we will have to forget clothes.