Inspector Chappel attempts to keep his head above water under the weight of a murder investigation, but is increasingly compromised as he finds himself vying with a City futures trader for the heart of a prostitute.

Joe Robinson earns promotion to Inspector - and Chappel demands that he helps him on one last case. Meanwhile the newest member of the team, P.C. Kirsty Morgan, gets dangerously close to her work - seducing a suspect.