This odd film runs in two parallel lines. First, as an action "hitman" type film, where it succeeds only partially. The first hour is too slow for that. Typical action scenes are found only during the last twenty minutes or so, and they are not particularly impressive.
At the same time, the film intends to convey a human tragedy and depicts human emotions, not exempted from nobility. It works at times, helped by an extraordinary young actor playing a lovable boy, which builds an emotive relationship with the Executor.
The background of the plot (an evil priest runing a criminal organization) is too farfetched to be believable, but then again, "hitman" films are never believable by definition. On the other hand, a couple of stars should be awarded for originality.
All those observations notwithstanding, the movie is done carefully and well, acting is impeccable and dialogues are fluid and reasonable for the situation.
If you are not after a real "action" film but you look for something more, more emotionally involved, then you would enjoy this unusual production.