2 innocent men are iced by a currency exchange bookkeeper, to disguise her embezzlement. The sultry femme fatale's yarn that it was a heist gone bad makes sense at first, because of a wave of such robberies on Chicago's Far East Side. But the murdered customer Halper checks out as a solid working stiff, plus the other stick-ups were solo jobs while this was supposedly a 2 hood hold-up, so M Squad's debonair Lt. Ballinger's sic-ed on the case to soften up hard boiled Ora Kane.
Danny Mitchell is trying to find an engagement ring for his girl when he mistaken for a thief by the store owner. A fight convinces him he has killed the old man-- as such Danny's on the run! Ballinger is called in to find the kid before he gets into real trouble.
The wife of a brain surgeon is abducted and threatened with death if the surgeon goes ahead with an emergency operation to save a critically injured police witness that can implicate a loan shark in two murders.
An innocent man will be executed in 48 hours unless Lieutenant Ballinger can convince a socially prominent woman to recant the false testimony that she gave as a result of a ruthless blackmailer's threats.
Lieutenant Ballinger and the FBI have few leads and little time to find a kidnapped socialite with a predilection for visiting jazz clubs. Bound, unattended, and hidden in a condemned building during a cruel Chicago winter, the young woman is in grave danger of dying from injury or exposure before she can be rescued.
A swimsuit model is found dead in Lake Michigan, but physical evidence indicates the she may not have drowned while swimming. Lieutenant Ballinger becomes convinced that she was murdered after he learns that she was a strong swimmer and an iniquitous individual with a large number of unexplained bank deposits.
A D.J threatens to reveal the influence of racketeers in the music industry. Before he can go to air with the information he is gunned down. M squad are brought in to solve the mystery of the death as well as the validity of the information he was going to reveal.
LT. Frank Ballinger takes a personal interest in a case when the wife of convicted murderer Paul Danzig approaches him for help. Danzig has only 20 hours to live and his wife talks openly of stopping the clock. Ballinger has to figure out what she means, and ensure the right man pays for the crime of murder.