PC Felly is badly beaten after discovering a robbery in progress. Unfortunately for him it takes several hours for police to discover something is wrong.

Hawkins and Snow are to due give evidence in Herbert Andrews robbery trial. Much of the case resolves around forensic evidence so Andrews counsel is out to discredit the pair.

Harry Hawkins receives allegations that Sgt Jack Stirling is having an affair Jean Buxton, who's husband Tony he put behind bars. Hawkins and Watt decide to do some low key investigating first.