In this film Statham plays an assassin who trains the son of his mentor to ply his particular trade after he's asked to kill his mentor by the people they work for. Donald Sutherland plays the mentor, and I'm inclined to think that he must have done this for the money, why else would he do something that could have been turned into Crank 2 or The Transporter 4 fairly easily.
People who like Jason Statham movies will enjoy this movie. It's no better or worse than anything else he's done. If I were anyone else I wouldn't bother.