The Mechanic - 1972

Arthur Bishop is a veteran hit man who, due to his penchant for making his goals' deaths look like injuries, believes himself . It has made him rich, but he's so depressed and lonely he chooses one of his victim's mum, Steve McKenna, because he hits middle period. Arthur brings him and puts him through a rigorous training stage. As Steven improves, Arthur worries he'll find who murdered his dad.