When a ransom bid results in the death of a child, the police have only one lead – the old lady who witnessed the kidnapper using a public phone box. Though her recollection is vague, she volunteers to act as bait for the killer – telling the press that she had seen the kidnapper's face and she waits for him to attack.

Is Do You Know This Voice? on Netflix? Yes! The movie Do You Know This Voice? is now on Netflix in the countries listed below.