Insomnia

Insomnia is a 1997 Norwegian neo-noir thriller film directed by Erik Skjoldbjærg, who co-wrote it with Nikolaj Frobenius. The film follows a police detective investigating a murder in a town located above the Arctic Circle. The investigation goes horribly wrong when he mistakenly shoots his partner and subsequently attempts to cover it up. The title of the film refers to his inability to sleep, the result of his guilt, represented by the relentless glare of the midnight sun.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.