This movie is based on true events. The real characters are still in prison.
While the film is based on a true story, the Hattab-Sarraud-Subra Affair, which occurred in the 1984, and a non-fiction book relating the case, Bertrand Tavernier chose to set the action in 1993 and change the character names. Thus the real life Valérie Subra became Nathalie Magnan in the film.
The film underwent a 4K restoration by the Eclair laboratory under the supervision of cinematographer Alain Choquart and funded by the Arte France Cinema Unit.