A man is convicted of killing his boss, whom he suspected of having an affair with his wife. On board the train taking him to prison for his execution are a reporter, who is dying of lung cancer and wants to interview the condemned man--and who also has some inside knowledge of the circumstances of the man's case. Also aboard is the prisoner's wife, who doesn't believe her husband is a killer and desperately wants to talk to him about it but he refuses to speak to her.