According to CNN's Tom Charity, the film "Mother", which stars Kim Hye Ja and Won Bin, was the sixth best movie of 2010. The film is about a mother (Kim Hye Ja) who is on a mission to prove that her mentally challenged son, Do Joon (Won Bin), is not responsible for the brutal murder of a woman.

6. "Mother" Korean soap actress Kim Hye-ja makes one of the movies' most unconventional amateur sleuths in the latest idiosyncratic thriller from Bong Joon-ho ("The Host"; "Memories of Murder"): a street herbalist convinced that her mentally challenged son is not the murderer he has been made out to be. Her investigation is unorthodox, intuitive and ultimately agonizing.

If you haven't already, it certainly sounds like a film you want to be checking out. Wiki IMDB Source: CNN Thanks to chyea226 for the tip!