This week on Fright Flick FMK, we’re talking about the 2022 Belgian horror film Megalomaniac, written and directed by Karim Ouelhaj. Inspired by the real-life “Butcher of Mons” case, this movie imagines what might have happened to the killer’s children… and it is not a feel-good family drama.

The story follows siblings Martha and Félix, who grow up isolated and deeply scarred by the legacy of their father, a notorious serial killer who targeted women. Martha works at a garment factory where she’s constantly harassed and belittled, while Félix becomes increasingly obsessed with embracing their father’s violent past. What starts as simmering trauma slowly mutates into something darker, as Félix begins killing again and pushes Martha toward accepting the same blood-soaked inheritance.

And yes, we’re going there. The film doesn’t shy away from brutality. There are suffocating scenes of workplace abuse, graphic violence, and a grim, inevitable turn where Martha herself finally snaps, stepping fully into the horror she’s tried to suppress. By the end, it’s less about jump scares and more about whether violence is learned, inherited, or just waiting for the right moment to surface.

It’s bleak. It’s heavy. It’s arthouse horror dipped in cold industrial despair.

So the real question is: is Megalomaniac something I’d F*ck, Marry, or Kill?

Let’s get into it.