What No One Knows

What No One Knows (Det Som Ingen Ved) is a Danish movie released in 2008. According to director Søren Kragh-Jacobsen from the Internet Movie Database,the political thriller occurs when a young woman is found drowned on a winter night by the sea. The dead woman's brother, Thomas, discovers that her death is connected to their father, now deceased, and his work in military intelligence. As Thomas digs deeper into the case his family is brought into sudden danger.

all from http://www.imdb.com/title/tt0965411/