The plot revolves around British aristocratic detective Inspector Thomas Lynley and his working-class partner, Sergeant Barbara Havers, as they solve crimes interwoven with social issues . As the 8th Earl of Asherton, Lynley is from the highest aristocratic order of Britain outside the royal family , while Havers is a perceptive woman who cannot boast a rich heritage. The divide in their social status often makes for interesting conversations and differing perspectives that explore the themes of class and gender.