Brace yourself for some real truth. As you noticed on IMDb, this movie was advertised as "Crime / Drama / Mystery / Thriller". The trailer makes the movie look the same. Unfortunately, if you go to this movie with that in mind, you may and should be disappointed. When I see the genre described as it was, I want to see just that. Oh, you can add comic relief, maybe good music, some reasonable horror and nostalgia, but do not do what was done to The Black Dahlia.
They obviously didn't intend to make this a serious movie, but rather it was a cheap attempt to imitate a Film Noir sometimes, a TV mystery sometimes and then other times I don't think they knew what they actually wanted to do.
When I am sucked into a movie that I believe is going to be a mystery, I want to be able to enjoy the movie throughout and get involved in the mystery. In this case, the viewer has to spend far too much time trying to figure out what the movie is trying to do. Just give me the mystery that the movie is about. No one needs to make the movie-making process a mystery.
For those of you who are going just to see Scarlett Johansson, I have to say I am very disappointed in her. Her acting needs a lot of improvement or she needs to find movies that embrace her sensuality. Yeah, she is sexy in this movie, too, but her voice does not fit her actions and her acting is puzzling, not mysterious. I want the Scarlett I knew from "Lost In Translation" and "American Rhapsody" at least she could act and her voice fit her character. Other main characters were just as puzzling, however. And honestly, the best and most interesting characters were treated somewhat like extras, though one of those "extras" was by far the best actress in the movie.
You can call this an imitation Film Noir Graphic Novel that should have taken a more serious approach to even those genres.
I gave it a 4 out of 10 out of generosity.
