Jason Statham is Arthur Bishop - the 'mechanic' - an elite assassin with a unique talent for eliminating targets with deadly skill and total emotional detachment. The only attachment in his life is to his mentor and friend Harry (Donald Sutherland).  When Harry is murdered Bishop takes on a self-imposed assignment to kill the murderers, using Harry’s own legacy to avenge his death. Harry's son Steve (Ben Foster) emerges with the same vengeful goal and determination to learn Bishop's trade and soon a deadly partnership is born. But while in pursuit of their ultimate mark, deceptions threaten to surface and those hired to fix problems become the problems themselves.