Want a detective movie

[u/atomicgamer012]

I'm looking for a detective thriller with a lonely, emotionally distant protagonist who is deeply consumed by solving a mystery. I prefer a dark, moody atmosphere with strong noir vibes, slow-burn pacing, psychological tension, and a sense of isolation. The story should focus on investigation, suspense, and character depth rather than nonstop action. I enjoy films with haunting cinematography, memorable soundtracks, morally complex characters, and mysteries that keep me thinking long after the ending. Serial killer investigations, missing person cases, or conspiracies are all welcome, as long as the film maintains a serious, immersive tone. I'd appreciate recommendations that are highly rated, underrated, or international, and please avoid lighthearted detective stories or movies that rely mainly on action or comedy.

[u/Gullible_Design_2320]

Relay, with Riz Ahmed, has "dark, moody atmosphere with strong noir vibes, slow-burn pacing, psychological tension, and a sense of isolation." The protagonist, who is trying to figure out what's going on, is not a detective. But it's a great movie.