Good policing doesn't necessarily mean doing everything by the book. But as the business of crime in London turns to favour the Albanians and Turks, how does a "good" policeman survive?

An illegal immigrant from Albania infiltrates the lives of a group of Londoners with devastating consequences.

Brought to the station after nicking some sweets, a waifish Eastern European girl refuses to give even her name. What starts out as a simple case of shoplifting turns into apparent murder, however, after Davies finds the girl's mother strangled. The trail leads to some surprising suspects from a video matchmaking service.