Top-notch reporter Steven O'Malley (Spencer Tracy) has come to a small town to investigate the death of Robert Forrest, a national hero. He's determined to get a story, but when he meets and falls in love with Forrest's widow Christine (Katharine Hepburn), the story he gets is not the one expected. As O'Malley digs into Forrest's personal life, he soon finds that the man who dined with presidents may have been involved in a plot to overthrow the government. Falling in love with Christine makes it hard for O'Malley to be objective, but soon he suspects the beautiful widow was a part of the plot. Caught tight in a web of suspense and treachery, O'Malley is faced with the decision whether or not to expose Christine. When he confronts her with the evidence, she refuses to speak out in her own defense. Now O'Malley doesn't know if his lover is guilty or innocent. But one thing is for certain: someone is going to try and stop him from ever finding out.