Alyssa (Lana Boy) follows her artistic aspirations to Los Angeles, leaving behind her husband Luka (Emmanuel Berthelot), who promises to join her later. The pandemic-induced lockdowns force them apart, straining their relationship until the couple decides it’s best to separate. Upon returning to Paris to finalize her divorce, Alyssa finds herself engulfed in her past life with Luka and old friends, all of which have moved on. She starts to question whether she was selfish to leave her past life behind in pursuit of career goals. Should she have been happy with the “little life” she left behind? Could she have been?

Deep in the heart of the Moselle, in the Uckange furnace Park, is a crime scene as spectacular as it is baffling. The victim is the former Director of the site. When the relentless but sensitive Clément Leroy, captain of the criminal section of the Metz gendarmerie, sets out to investigate, he reconnects with his childhood love, Laure Thouvenin, the victim's daughter and a specialist in industrial history. As this free and unconventional woman becomes increasingly involved in the case, she and Leroy unravel the shocking story of their respective families running over three generations.

Alphonse and Zélie, the two parliamentary assistants of Laurence Tronchu, a prominent figure of the left, are tasked with writing a speech against the far right, to be delivered the very next day. But they have opposing views on the strategy to follow, and their conflict will last until the break of dawn.