Detective Sergeant Mark 'Heck' Heckenburg has a reputation for bending the rules, but when a ruthless gun attack on a North London pub leaves 26 of his closest workmates dead, he throws the rulebook away. But Heck himself is a suspect. Suspended from duty and watched day and night, it isn't just a matter of eluding the surveillance net in London. When he makes his move, he becomes a fugitive, an outlaw now being hunted across the UK.