President Lyman, portrayed by Scott Williamson, becomes the target of an assassination attempt, which results in a U.S. retaliatory bombing of Venezuela, accusing the country of orchestrating the attack. In this tense atmosphere, Rachel Armstrong (Kate Beckinsale), a driven reporter for the Capital Sun-Times based in Washington D.C., is on the verge of exposing a significant story. She is set to publish allegations that the Lyman administration willfully deceived Congress and the American public by blaming Venezuela for the assassination attempt, all while ignoring a CIA report from operative Erica Van Doren (Vera Farmiga) which determined there was no connection between the country and the attack.
Rachel holds onto vital evidence: a memo written by Erica, who is deeply involved in the investigation and whose daughter, Alison, attends the same school as Rachel's son, Timmy (Preston Bailey). Refusing to disclose her source, Rachel confronts Erica at a soccer game, where Erica, while denying her CIA ties becomes agitated by what she perceives as the reckless behavior of journalists. Confident in her findings, Rachel publishes her report, which swiftly makes headlines and gains the unwavering support of her editor, Bonnie Benjamin (Angela Bassett), along with legal counsel Avril Aaronson (Noah Wyle).
However, the CIA quickly becomes aware of Rachel's impending reveal. Erica's supervisor, Merill, grows suspicious that Erica may have leaked information to Rachel, especially since she expressed frustration over being ignored by the White House after submitting her report. In an aggressive move, they decide to polygraph everyone at the agency to uncover the source of the leak. The ramifications of exposing a covert operative's identity are severe, as it could be considered treason if committed by a government official. Consequently, special prosecutor Patton Dubois (Matt Dillon) assembles a grand jury to find and prosecute the leaker. When asked about her source, Rachel staunchly declines to provide any information, leading to her imprisonment for contempt of court.
The high-profile lawyer Albert Burnside (Alan Alda), representing Rachel, underestimated the situation's gravity, exclaiming that the judge made a serious miscalculation when his client was jailed. He compares mistakes with biting remarks, saying, >“sometimes a mistake is like wearing white after Labor Day, and sometimes a mistake is invading Russia in winter.” In the following days, Burnside fights for Rachel's release on bail, but the judge sets conditions, insisting Rachel must consult her source before revealing their identity—conditions she vehemently rebuffs.
As time goes on, Erica faces pressure within the CIA, even after successfully passing a polygraph examination. Her anger boils over as she threatens to disclose confidential information, while facing the possibility of her custody battle over her daughter being manipulated against her. The tension escalates, and as weeks turn into months, Erica is tragically murdered outside her home, escalating the stakes for Rachel.
Despite facing harassment from fellow inmates and an estrangement from her husband, Ray Armstrong (David Schwimmer), and son Timmy, Rachel holds firm in her commitment to protecting her source. Over her imprisonment, the mounting fines against her newspaper reach astronomical amounts, as Dubois persuades the court to impose a daily fine for each day that Rachel refuses to disclose her source. Rachel argues to Dubois, that revealing her source post-murder could endanger others, but the situation spirals further when a White House staff member admits to leaking information about Erica—an action Rachel had already known about prior to their meeting.
With Burnside appealing all the way to the Supreme Court, he stresses that without the protection of sources, the freedom of the press and, by extension, democracy itself hangs in the balance. Unfortunately, the court sides against Rachel in a close decision. Eventually, the judge recognizes that continued incarceration serves no purpose, deciding ultimately to release Rachel, who has not been convicted of any crime. Just as she steps out, Dubois intervenes, instigating an arrest on grounds of obstruction of justice, leading Rachel to accept a plea deal that includes a two-year sentence but allows the possibility of early parole for good behavior.
As Rachel is taken to prison, she reflects on a moment spent volunteering at Timmy's school, where she recalls a conversation with Erica's daughter, Alison. In this innocent exchange, Alison inadvertently reveals that her mother worked for "the government" and had recently traveled to Venezuela for "business," shedding light on the chain of events that have led to her current predicament.
