I watched it without knowing anything about the plot. I thought this is a "mindless fun" slasher movie. It's not. There is nothing enjoyable here, too bleak/sad/disturbing. This is how serial killer Ted Bundy spent a day of his life, having a psychotic break. There are positive things here, i mean, this movie takes you to a journey into Bundy's mind. Camera focuses on the victims, not him, but there is nothing voyeuristic here. It's just raw and real. This movie doesn't glorify serial killers as many other movies do. It shows you the truth, the ugliness, nothing charming here, it's a movie about the victims not the monsters. It made me uncomfortable to say the least. And i didn't like it, i was not ready for this. It looked more like a documentary or like a FOUND FOOTAGE than a "normal" movie. It gets a bit satisfying in the end, when it shows some shots from the actual Bundy trial. But overall, it was too disturbing for me.

There is zero entertainment value here but if you find it interesting as it was described, you might like it more than me. It's a journey into the heart of darkness. I got goosebumbs when i realise what the title THE BLACK MASS actually means. It's not a sick movie like so many movies, it doesn't "idolize" serial killers and that's a good thing but still, if i knew what this is about, i would have never watched it.