Ed and Eve travel to Mexico to assist in the interrogation of a former suspect in a murder case, who has been arrested for a similar offence across the border. The local police are determined to convict him, but Ed and Eve are equally certain that he is innocent; and when he is helped to escape from police custody, suspicion falls on them.

Alone in the office, Fran Belding is attacked by an escaped convict, and helped by a mystery man who refuses to tell her his name. The next morning he is reported missing by his wife, and his disappearance seems to be connected to the case of a major drug dealer whose very existence has always been suspect.