When an off-duty officer sees a small drug deal, it leads police to a huge cannabis farm. And a case of car clocking triggers a battle of wits between a cop and a serial crook.

What looks like a devastating burglary of family heirlooms proves to be a sham and exposes the so-called victim as a million-pound fraudster. And when police stop a suspicious-looking car on a hunch, they end up bringing down an unscrupulous drug dealer.