James Donovan, an American lawyer, is asked to defend a Soviet spy in court. It is important that the spy gets a fair trial so that the image of American justice is upheld in the midst of the Cold War.
Sunny challenges the class to not advocate for the guilty man, stating that by doing so they are becoming advocates for the crime. Her professor provides a rebuttal and asks if the man really had a fair trial. The basis of the legal system is that everyone gets a defense and the right to a fair trial.
In a case where the odds seem stacked against Frank is on the stand, and he successfully turns the case to his favor. He argues that the opposing party has conflict of interest due to their past connections.