Blood Simple.

Julian Marty, a ruthless bar owner, hires crooked detective Loren Visser to kill his wife, Abby, and her secret lover, Ray. But this plan falls apart when misunderstandings and distrust poison the relationship of these four people. With bodies missing, money stolen, and blood spilled, who can really be trusted? In a world where everyone plays dirty, only the shrewdest will survive. Who will emerge victorious—or at least, alive?