Insomnia

In Christopher Nolan's "Insomnia" (2002), two Los Angeles homicide detectives, Will Dormer and Ephraim Baumann, are sent to a perpetually sunlit Alaskan town to investigate the murder of a teenager. The film's relentless daylight mirrors the detectives' psychological unraveling, as Dormer grapples with a past mistake and Baumann's growing suspicion of his superior's involvement in the crime. The claustrophobic atmosphere and relentless surveillance create a tense, introspective thriller that probes the limits of moral integrity and the human psyche.