DC Webb and DC Riley wait outside a cafe, whilst inside DS Debbie McAllister is conducting a rather clumsy undercover sting on a suspected drug dealer. DI Cullen is furious when the suspect is released without charge following McAllister's poor handling of the case. Resentful of DS Singh's success in recruiting local informants, McAllister manages to coax some information from solicitor's clerk Jamie Ross, which eventually leads to a successful arrest when Ross's information blows apart a stabbing suspect's alibi. Pleased with her success, McAllister is determined to convince Ross to work as an informant for her. Meanwhile, DC Paul Riley meets up with his brother Joe, who seems to be in some trouble with the Nottingham police.
