A Scotland Yard Detective with a Conscience.
Mr. Peter Benskin is a young public school graduate with a small private income who joins the police force in London. After an early success he transfers to Scotland Yard where he becomes a detective. He is successful in solving several difficult cases but is hampered at times by his ethical feelings towards criminals who have been coerced or forced to commit crimes. He allows the "innocent" to escape, while he pursues the "truly" guilty. He develops a reputation as one of the most effective and disciplined detectives on the force.
In Part Two, Benskin, aided by the intrepid young Lady Muriel Carter, comes up against a super criminal named Matthew who taunts the police. Matthew runs an extensive gang of jewel thieves with an iron hand, clever disguises, and secret hideouts. Benskin and Matthew battle each other through a series of encounters in high society, and in the confines of a leather merchant in London. A milieu which Oppenheim knew well.