As the narrative unfolds, Mark Whitacre, portrayed by Matt Damon, starts off by revealing the pervasive role of corn in nearly every meal consumed, emphasizing that his employer, ADM, plays a crucial role in the production of this staple. He is at the helm of ADM’s lysine production, a key additive in the livestock industry, but faces mounting challenges that lead to financial losses for the company. Whitacre soon discloses that ADM is falling prey to a saboteur and cites a Japanese colleague demanding $10 million to provide information. Consequently, ADM enlists the FBI's assistance to tap Whitacre's home phone.
When FBI agent Brian Shepard arrives to install listening devices, Whitacre's wife Ginger urges him to come clean. In a moment of tension, he persuades Brian to talk in the agent's car, suspecting that ADM has bugged his house. He discloses that ADM is involved in colluding with Japanese and Korean companies for price fixing. This admission prompts Brian to report his findings, showcasing evidence of extensive corporate malfeasance. However, when ADM discovers the breadth of FBI surveillance, they cut ties with the agency and instruct Whitacre to cease cooperation.
Initially, Whitacre denies any ongoing wrongdoing at ADM. Yet, he is cornered by Brian and another agent, Robert Herndon, in a hotel, where he ultimately admits to fabricating the mole and extortion story to deflect blame for his own lack of productivity. Embracing the role of informant, Whitacre oscillates between altruism and personal ambition, as he harbors desires to unseat ADM executives and ascend to the presidency of the company. He begins clandestine recording sessions, completing over 200 tapes filled with entertaining anecdotes that detail corporate crimes.
The FBI manages to capture incriminating video evidence from ADM’s meetings with foreign competitors with Whitacre's valuable assistance. Although the FBI is pleased with the findings, securing the Justice Department's confidence proves to be a challenge. After two years of effort driven by Whitacre’s revelations, the FBI orchestrates a monumental raid on ADM, seizing records and computers. In a bid to divert suspicion from himself, Whitacre is advised by the FBI to inform his employer about his cooperation while securing independent legal representation.
However, the raid triggers a fallout for Whitacre, as he becomes an outcast in the corporate world and his family faces exclusion. Despite a confidential arrangement, details of his case leak to the Wall Street Journal. Meetings with agents Brian and Robert ensue, where Whitacre divulges his long-standing practice of embezzlement, though he alters the sum he misappropriated—ultimately claiming over $11 million. His complex scheme involved creating a shell company that issued fabricated invoices to ADM, though the intricacies of his fraud remain murky.
As investigations intensify, Whitacre's world collapses around him, and he experiences an emotional breakdown, revealing that he suffers from Bipolar Disorder—a diagnosis that he later aims to use as part of his defense. The narrative unveils fabricated tales of a lavish upbringing, a staged kidnapping, and ongoing media interactions that defy his attorneys' guidance. His legal team ultimately parts ways when he refuses a plea bargain, prompting him to hire a questionable new lawyer who tries to leverage a supposed assault by Brian as a point of appeal.
After weaving a tapestry of lies, Whitacre's confrontation with Brian culminates in a moment of despair, prompting him to seek hospitalization. The story shifts dramatically to his sentencing, where Whitacre delivers a convoluted statement, admitting to his medication regimen. The judge, however, dismisses any connection between his mental health and the extensive fraud he perpetrated, resulting in a nine-year prison sentence—three times longer than that served by the executives implicated as a result of his tapes.
With the support of agent Robert, Whitacre petitions for a presidential pardon, confessing that his embezzlement was a misguided safety net in the event of losing his job due to his role as an informant. Although his request for clemency is denied, his contributions are pivotal in one of the largest price-fixing cases recorded, leading to multimillion-dollar penalties imposed on ADM. Ultimately, the audience is left with a profound image of Whitacre's release from prison, greeted by Ginger, along with the revelation that he has assumed the role of COO at Cypress Systems.
