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Don Henderson (Greg Kinnear), a marketing executive for a national burger chain must leave blissful ignorance behind when his boss gives him an unsavory assignment: Investigate scientific findings that cow manure is contaminating the meat used in the company's top-selling hamburger. Don's search takes him from his comfortable office to a vast feedlot, to the inner rooms of a slaughterhouse manned by illegal immigrants, who must do all the dirty work. Wikipedia