Roxana Aubrey decides to drop her studies and escape her life in Paris for a free diving course in the south of France. She is quickly pulled into a life that reaches new depths brought by the weight of an ocean's descent.

Since 2014, France's restorative justice programmes have offered a safe space for supervised dialogue between offenders and victims. Grégoire, Nawelle, and Sabine, victims of heists and violent robberies, agree to join one of these discussion groups alongside offenders Nassim, Issa, and Thomas, all convicted of violent robberies. Meanwhile Chloé, a victim of childhood sexual abuse, prepares for dialogue with her own agressor after learning he has moved back into town.

1967, Mardi Gras. Françoise is a seventeen-year-old boarder in an all-girls Catholic high school. Convinced that she has only one night left before her death, she sneaks out with her friend Delphine to attend a costume party and live the night as if it was her last.