Following police on a manhunt for a dangerous suspect, as dog-handler Jen and crime-fighting canine Quantum search in the dark for the assailant. A crackdown on cannabis cultivation leads police to £500,000 worth of Class B drugs farmed in a disused warehouse, and on the roads, a van with false plates causes complete carnage.

Officers from the knife crime team give chase when a handcuffed suspect makes a break for it, but with his hands behind his back he soon face-plants into the tarmac. Meanwhile, stakes are high as the interceptors comb the streets for a man who has threatened to stab his former partner and harm her horse.