Lonely old women are being strangled, and Chief Ironside believes that there is more to it than just a serial killer at work. Setting Eve up as a potential victim requires a little ingenuity, but it might just prove to be worth the effort.

A young pool hustler is coerced into a contract with a crooked promoter when his brother amasses large gambling debts. The Chief steps in, but can he get through to the brothers in time?

When a lowlife bookie is found severely beaten, five witnesses identify Ed as his attacker. Unable to provide an alibi, Ed finds himself having to prove his own innocence; and when the victim dies and Ed is arrested on a murder charge, the team have to find out who the real killer is.

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.