On 18 December 2012, Variety reported that Matthias Schoenaerts would reteam with Bullhead director Michael R. Roskam in the film, and it would be produced by Bart Van Langendonck at Brussels-based Savage Film and was set to start shooting in 2014. On 21 December 2013, Variety announced that Thomas Bidegain would write the screenplay alongside Michael R. Roskam. On 12 September 2015, Adèle Exarchopoulos joined the cast, and the film was described as a "noirish romance thriller set against the backdrop of crime gangs in Brussels", and shooting was scheduled to start in 2016.
