Nightmute City is a fictional city that appears in the 2002 crime thriller film "Insomnia." The city is located in Alaska and is known for its extreme weather conditions, with the sun not setting for months during the summer. The film follows Detective Will Dormer, played by Al Pacino, who is sent to Nightmute City to investigate a murder. The constant daylight and lack of sleep start to take a toll on Dormer, leading to a series of events that blur the lines between right and wrong. Nightmute City serves as a dark and isolated backdrop for the film's atmospheric tension and moral conflicts.