Wow, it's hard to sum up how amazing this movie is but it really blew my mind.
IMDB link: http://www.imdb.com/title/tt0364569/
"An average man is kidnapped and imprisoned in a shabby cell for 15 years without explanation. He then is released, equipped with money, a cellphone and expensive clothes. As he strives to explain his imprisonment and get his revenge, he soon finds out that not only his kidnapper has still plans for him, but that those plans will serve as the even worse finale to 15 years of imprisonment."
The plot twists in this were amazing and I couldn't pause it at all!
It's a Korean movie and to be honest it beats the living crap out of most American movies I have seen recently.