Charles Bronson re-teams with director Michael Winner -- sandwiched between their first pairing in the underrated Chato's Land and their seminal collaboration in Death Wish -- in this Lewis John Carlino-scripted actioner. Bronson plays Arthur Bishop, a "mechanic" or hired killer, famed for his efficient and unfeeling contract executions. The young and eager Steve McKenna (Jan-Michael Vincent) teams up with him, hoping that Bishop will teach him the bounty-hunting business. Imparting words of wisdom to Steve like, "Murder is only killing without a license and everybody kills -- the Army, the police," the two undergo a series of adventures as Bishop shows Steve the ropes. Between action scenes, Bronson's wife Jill Ireland makes an appearance as a sexy hooker.