This owes more to film noir as the story is told in flashback from the docks of the criminal court.
Barry Foster is young PC Hollis. He owes money to a small casino and he falls for a married woman Lisa Shillack (Margit Saad.)
Lisa is unhappily married to her wealthy businessman husband. Of course divorce is out of the question she is used to a life of wealth and privilege.
Hollis is the sap who is infatuated by Lisa and commits murder for her.
It's not long that he is left carrying the can for murder on his own. Even his alibi quickly falls apart. Lisa just knew what numbers to press.
It is good to see Barry Foster in an early role, especially when it dawns on him that he has thrown his career away for a woman who used him. Margit Saad is fantastic.