Mark Whitacre was a high flying executive at Archer Daniels Midland, when he decides to blow the whistle on the company's nefarious price fixing of lysine, an additive used in the livestock industry. He teams up with the FBI and walks around wearing a wire and surreptitiously filming secret meetings. But the pressure of leading a double life starts to show as his character starts to fray at the edges resulting in tragicomic situations. Matt Damon shines in this role and you are left in an enjoyable muddle of trying to figure out reality from Whitacre's imagination.
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