Arthur Bishop is a 'mechanic' - an elite assassin with a strict code requiring professional perfection and total detachment. One of an elite group of assassins, Bishop may be the best in the business - with a unique talent for cleanly eliminating targets. When Harry McKenna, his close friend and mentor, is murdered, Harry's son comes to him with vengeance in his heart and a desire to learn Bishop's trade, signaling the birth of a deadly partnership.

Mickey Jones is an all-American rockabilly, complete with slicked-back hair and smokes rolled in his sleeve. Yet, behind his cool demeanor he is plagued by an abusive past.