Pat Chappel runs into his former boss, DS Frank Vickers in a basement of a Soho brothel.
Jane walks back into Chappel's life; a dangerous flirtation develops between Joe and new recruit Kirsty; Jane returns to the work she knows best and signs up with an escort agency.
Chappel takes an undercover assignment in a sex-offender prison.
Chappel and Vickers approach an endgame; Chappel hopes to reunite with Jane.