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Det. Insp. Brook starts surveillance on leads he picked up from the drug bust. Ramsey is living in France with Dany. They befriend Sara, a young musician who's money has been stolen. Ramsey is livid that she has chosen to be a drug mule.

Det. Insp. Brook is suspended from duty after receiving heroin brought by Sara. Visiting Ramsey in France he's looking to find who set him up. Brook recruits pickpocket Christine and attempts to track down Sara's contact T.J.

Brook wants Ramsey to return to London to testify against the crew of the Jack London but he starts to gets cold feet when he receives a set of photographs of Dany. Visiting Simon Wood they gets their first lead on "The Frenchman".

Ramsey goes it alone and heads to the Cotswolds. Using Wood's client list he stirs up the locals to get information on "The Frenchman" using his real name of Lambert. With the net closing, Lambert attempts to kill Ramsey.

Det. Supt. Granger arrests two of Lambert's heavies who were trying recover a package lost when Linda Moss died in a car crash. The drug squad start arresting Wood's contacts in the Cotswolds but Lambert has Diplomatic Immunity.

Lambert is hiding out at the Palmer's remote house, in the country. Ramsey finally tracks him down but only injures Lambert. His attempts to escape become more and more reckless before the pair meet for one last confrontation.