John Stone, former army sniper, mercenary turned hitman, is sick of killing. When contracted by a shadowy government figure to take down an ex-member of parliament, testifying in an arms scandal that would embarrass the government, Stone decides it would be his last assignment. However, notorious North London gangster, Alex Brant, makes him an offer too good to refuse. What he believes will be one last run-of-the-mill job, turns out to be anything...