Ashton intervenes as a pair of masked men try to set fire to a house. Burnside is seconded from Crime OCCU to investigate, due to another arson with the same MO occurring on Stafford Row's patch. Meanwhile, Holmes is approached by a witness in the case of a vicious stabbing attack who has suddenly decided not to testify. It is soon revealed that the attempted arson attack victim is the brother in law of the witness, and that the other witness is the boyfriend of the woman hospitalised in the Stafford Row. With two out of three witnesses attacked, it's not long before Holmes is assaulted in a pub car park after a night out. An informant of Holmes reveals that stabbing suspect's brother, Kevin Butcher, has sparked a dealing war on the local estate, and Meadows is livid as uniform become subject to a series of attacks by Butcher's gang.