What No One Knows (Danish: Det som ingen ved) is a 2008 Danish political thriller film written and directed by Søren Kragh-Jacobsen, and starring Anders W. Berthelsen, Maria Bonnevie, Ghita Nørby, and Lars Mikkelsen.

[1][2][3] 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.

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