Se7en
From the intense rain falling onto the unprotected actors, metaphor to the proximity and seriousness of the evil, to the shocking scenes, this movie really tells you his story. All of this is combined with a truly unexpected ending, really showing us the incredible and unique way which the killer thinks, concluding the film with almost like a moral, something that makes you reflect and maybe admit the innocence of the murderer. This is a really interesting and almost controversial movie.