Sidney and Geordie pop down to London to visit a jazz nightclub and stumble into a murder. The dead woman is Claudette, the sister of Johnny, the man Sidney's sister went out with.
Their father Archie who is white is distraught. However the killing could be linked with something Archie himself did in the past and his tempestuous marriage with his children's black mother.
There are plenty of twists in this murder with sins of the past and bent coppers. It all grinds to a halt as we see Sidney moping around Amanda who he meets, he gets warned off by Amanda's fiancee. Later Sidney sleeps with a jazz singer from the nightclub even though he has a German girlfriend back in Cambridge. His messy personal life does not go unnoticed by Geordie who seems to be rather proud of the vicar's extracurricular activities.
The episode rather cements the relationship between Geordie and Sidney, the cop and his bible carrying assistant.