After several failed attempts to stop the recurring cycle of murders at the hospital, the protagonists put a "bold plan" in place to trap the assassin.

The finale resolves the central mystery of Marc’s death on December 31, 2023, while exploring how the characters' interventions have fundamentally altered their personal lives—specifically Juliette's relationship with her husband and Cédric's future with Margot. Major Themes and Production

For further details on the series and its cast, you can visit the Année zéro page on AlloCiné or review the episode guide on IMDb .

A central theme is the unpredictability of time; as the trio navigates the year 2023 for a second time, they discover that every decision to "save" someone has ripple effects that create new dangers.