Blood Simple. (1984) is a crime thriller directed by the Coen Brothers, starring Frances McDormand in her film debut alongside John Getz and Dan Hedaya. The film won the Grand Jury Prize at the Sundance Film Festival and follows a bar owner who hires a private investigator to murder his wife, leading to a chain of escalating violence and misunderstandings.

Från IMDB:
The owner of a seedy small-town Texas bar discovers that one of his employees is having an affair with his wife. A chaotic chain of misunderstandings, lies, and mischief ensues after he devises a plot to have them murdered.