Pieta - Golden Lion winner at 69th Venice Film Festival

Pieta was announced as the winner of Golden Lion at 69th Venice Film Festival for Best Picture Award beating out other 18 main competitors. So what makes the movie feature written and directed by Kim Ki Duk worthy enough to win it?

Synopsis :

The movie name Pieta comes from the famous statue during Reinassance signifying depictions of the Virgin Mary cradling the corpse of Jesus. Pieta is about a solitary man who grew up as an orphan works as a cruel loan shark. A mysterious woman claims to be his mother and he finds himself becoming attached to her only to realize her extreme there's something else going on. 

The trailer :

English subtitles :

The 18th Movie by Director Kim Ki Duk 
Lee Kang Do : Anxious. Suddenly I feel like I'm disappearing.
Jang Mi-Sun : Why are you so cold-blooded? There's no way you can forgive
11 years after , another bad boy has come
- : Give me another one week. If my husband become handicapped, it'll be the end of us
Jang Mi-Sun : Lee Kang Do. I'm sorry for abandoning you
The woman called 'mother' is here
Lee Kang Do : Who are you ? You said I came from here?
Jang Mi-Sun : This is all because of you
Two man and woman who can never receive forgiveness
Lee Kang Do : If I have to be alone again, I don't think I can survive
That woman has disappeared! 
Jang Mi-Sun : Save me please!
Lee Kang Do : I'm sorry. Please save my mother only.
One by one, the cruel secret is revealed! 
Jo Min Su as Jang Mi-SunLee Jung Jin as Lee Kang Do
Lee Kang Do : Are you really the mother who abandoned me?
Jang Mi-Sun : Devil

The movie was released in Korea on September 6th 2012.