P.C. George Dixon (Warner) is a long-serving traditional copper who is due to retire shortly. He takes a new recruit under his aegis and introduces him to the easy-going night beat. Dixon is a classic ordinary hero but also anachronistic, unprepared and unable to answer the violence of the 1950s.

Louis Mazzini’s mother belongs to the aristocratic family D’Ascoyne, but she ran away with an opera singer. Therefore, she and Louis were rejected by the D’Ascoynes. Once adult, Louis decides to avenges his mother and him, by becoming the next Duke of the family. Murdering every potential successor is clearly the safest way to achieve his goal.

John Sawyer, once an eminent barrister, has slid into a life of cynicism and drunkenness since his wife left him. When his daughter’s boyfriend is accused of murder, Sawyer decides to try to pull himself together and defend him in court.