The body of an armed police officer is found as the investigation continues. The team join the manhunt for a supposed cop killer named Bruno. Jack hopes to reach the killer first and believes he can talk him into handing himself in, before more murders are committed. As he continues his own investigation, he soon uncovers links to the gun trade in London. The other armed police officers are questioning their safety after the murder and it soon becomes apparent that the killer is very highly trained, putting more pressure on Jack and the links he has uncovered.