In the early 1990s, Archer Daniels Midland (ADM) junior executive Mark Whitacre (MATT DAMON) became convinced that if he helped the FBI gather enough evidence against his company's illegal price-fixing activities, he would look like a hero to the firm's board of directors and be elevated to president. After making contact with Special Agent Shepard (SCOTT BAKULA), Whitacre spends most of the next three years taping conversations, positioning hidden cameras, and handing over documents that seemingly give the federal government an airtight case.
When the arrest warrants are handed down, ADM's executive staff led by Vice Chairman Mick Andreas (TOM PAPA) and Head of Corporate Security Mark Cheviron (TOM WILSON) hire corporate attorney Aubrey Daniel (CLANCY BROWN) and devote significant man hours to dig up dirt on Whitacre, who has also taken part in his own fraud scheme to hide millions of payoffs in offshore accounts.
As the case falls apart, Whitacre is shown to be a seriously unbalanced individual. He ignores Shepard's repeated pleas not to talk to the media and tells lie upon lie until it is discovered that he has a bipolar disorder. Left out to dry by the Feds, Whitacre and his supportive wife, Ginger (MELANIE LYNSKEY), feel the pressure as seemingly everyone turns on them.