The Mechanic (2011)

An elite hitman, Arthur Bishop, teaches his trade to an apprentice, Steve McKenna, who has a connection to one of his previous victims. When Bishop's employer sets him up to kill his mentor and friend, Harry McKenna, Bishop decides to train Steve as a skilled assassin. As the two embark on various contracts, they begin to uncover a conspiracy within their organization. However, when Steve discovers the truth about Bishop's involvement in his father's death, their alliance turns into a deadly game of betrayal and revenge.