Following the disappearance of two girls, impulsive young police officer Paul Chartier is assigned to the secret unit "Maldoror" to monitor a dangerous sex offender.

When the operation is undone by the dysfunctional police and legal system, a frustrated and obsessed Chartier takes the hunt for the perpetrator into his own hands.

In September 2021, shortly following the premiere of Inexorable, it was announced Fabrice Du Welz was finishing a screenplay for a film titled Maldoror which was expected to begin shooting in 2022.

The scandal is named for Marc Dutroux, a convicted Belgian serial killer, rapist, and child molester who was sentenced to life in prison in 1996.

"[8] Although based on a real case, the film centers on a policeman tracking down Dutroux, a character which Du Welz fictionalized.

"Anthony Bajon, known for the films The Prayer (2018) and Junkyard Dog (2023), plays the lead role of police recruit Paul Chartier.

Co-stars include Alba Gaïa Bellugi, Alexis Manenti (who starred alongside Bajon in Athena) and Sergi López.

Du Welz described both actors as "family" with whom he felt comfortable to focus on "just the work, quickly and well, in the service of a film.

[4] It was co-produced by RTBF, VOO and BE TV, Shelter Prod and France 2 Cinéma, in association with One Eyed, as well with the assistance of the Cinema and Audiovisual Centre of the Wallonia-Brussels Federation.

[8] However, in August 2022, Frakas Productions published a casting announcement with extras being sought for filming to take place in March 2023 in the Charleroi region.