In the next episode of “everything for light” … The police question Marina, Roman Vinçon attends the students' concert, Justine is not the one we believe, and Max and Baya return to La Ciotat.

Mohamed gives a helping hand to Justine to transport the outfits of the concert. The young man is very stressed, and the assistant director advises him to find an outfit in which he would feel good. Noah observes them from afar.
To the comet, Élise finds Julian and wants to give him her place for the solo. Julian immediately refuses, and promises to be in the audience to support her. Sitting not far away, Solenn has fun scareing her sister by listing all the things that could go wrong. Eric intervenes and asks his eldest daughter to help his sister. Solenn is tired of being always asked and leaves.
The police arrive at the studio
A police officer, Captain Beauvois, comes to the studio. He wants to question Marina about Florence. The dance teacher denies the accusations of Eden that she injected morphine in Florence. She justifies Eden's behavior by the shock he suffered following the suicide attempt by his mother. While Justine arrives, Marina must leave in progress. The policeman was finished questioning him anyway.
Noah Charrie Mohamed in the locker room: there is something happening between Justine and him. In any case, he is convinced that she is not insensitive to the charm of Mohamed and encourages his comrade to try her luck.
Ali interrupts Elise's rehearsal because he is not satisfied with the performance of one of the students dancers, on which he is to the point of asking him to leave the room. Victoria points out to him that he transmits his stress to everyone, including Élise who is destabilized.
The arrival of Roman Vinçon
Victoria welcomes Roman Vinçon, the director of the RV Records label. The producer does not come back to see her again after so many years, and affirms it: she is an artist. But Victoria is now a child psychologist and does not intend to resume her singer career. She took the opportunity to present her brother, Eden, who goes through there. While Roman joins Justine in her office, Victoria wants to speak to Eden about her refusal to participate in the concert. She underlines that it is himself that he penalizes.
The young man is tired of the studio and the lies of his parents and Marina. Besides, his mother lied to protect Marina, and the police decided to drop the investigation for lack of evidence. Victoria tries to make him hear reason: he has a lot of talent and he should not spoil him. She doesn't want him to make the same mistake as her.
Even if she appreciates her job and her life, she was surely too radical at the time by cutting the bridges with everyone, and being overwhelmed by her emotions. Eden considers that in any case it is too late for the concert, but Victoria corrects it: he knows and masters the song.
Mohamed offers Justine to have a drink. She reminds her that she is assistant director. She is embarrassed but does not categorically refuse her invitation. While Roman Vinçon approaches her office, she gets rid of Mohamed, saying “we will see”.
Justine's double identity
While the concert is in full swing, Justine disappears with Captain Beauvois in a street. They know each other and are tu. The captain asked him why the Delaunat file disappeared from the hospital server the day the police opened an investigation. He knows that Justine is able to hack this kind of system and asks her what she is playing.
It has been months since she pretended to be what she is not. She takes too much risks, and should not hinder an investigation. But Justine is convinced that no one will realize anything, and that she can continue her investigation. She kisses her before returning to the concert.
While Mohamed and Élise interpret Everything for lightthe student is taken from a panic crisis at the time of her solo. She cannot take over, and Solenn, who is one of the dancers, does not hesitate for a second to seize the microphone and take the place of her sister. Eden, who looks behind the scenes, ends up going on stage to sing with Mohamed and Solenn.
Max and Baya back at La Ciotat
Their performance is coming to an end, when Baya and Max arrive, Victoria's daughter and husband. They find Victoria hugging Ali. Baya wonders about the identity of the singing teacher, while Max freezes.
After the concert, everyone ends up at the comet. Élise blames herself for letting her chance, and Victoria is sad that Baya and Max arrived at the end of the concert. Baya asks his father why he reacted as he faced Ali, but Max claims that nothing has happened.
Roman talks with Victoria: students have potential, especially Eden. He undertakes to sign a contract with a student by the end of the cycle but on one condition: that Victoria relaunches his career by making a single produced by him.