With knife crime on the increase, officers go undercover in Birmingham to find out which shops are illegally selling knives to children. They meet the family whose lives were ripped apart by a random knife attack carried out by two boys aged just 15 and 17. They track down the boss of a car park scam. He is making a fortune offering premium parking facilities and then dumping the cars in a muddy field. And they crack down on the sale of dangerous skin-whitening creams that damage the skin and put lives at risk.
