Even though he has no evidence, Baretta suspects a man named Mazurski of killing a petty criminal. His hunch is based on the man's wife Doris being injured during a burglary committed by the now dead man.

Baretta aids a watchmaker who refuses to pay protection money to a mobster.

Baretta must find a nurse's nine year old sister, witness to the murder of a blind hot dog vendor, before the killers do.