Insomnia is a psychological thriller directed by Christopher Nolan. The story follows Will Dormer (Al Pacino), a veteran Los Angeles detective sent to a small Alaskan town to investigate the murder of a teenage girl. Things go terribly wrong when he accidentally shoots and kills his partner. Facing pressure from Internal Affairs, Dormer tries to cover up the incident. Meanwhile, the killer, Walter Finch (Robin Williams), knows the truth and begins to manipulate Dormer, threatening to expose him. As the investigation intensifies, Dormer’s sleep deprivation takes a toll on his mind, blurring the lines between guilt, justice, and survival.