Sunflower (2006)

Years ago, Tae-Sik (Kim Rae-Won) was a feared henchmen for the mob, but after spending 10 years in prison Tae-Sik now only wants to live a normal life. He returns to a place he thinks of as home and to the woman (Kim Hae-Sook) who has looked after him like a mother. Trouble then finds Tae-Sik again, when gangsters want to build a nightclub over the land that Tae-Sik's mother occupies. Once the gangsters attack Tae-Sik's "adopted" family, Tae-Sik goes after the gangsters with pure vengeance.