The Hidden Face (film)

The Hidden Face Spanish La cara oculta is a 2011 Colombian thriller film directed by Andrs Baiz. An official Bollywood remake of the film, titled Murder 3, was made in 2013.

It is revealed that the house is owned by a German lady who shows Beln a secret room built to hide her husband just in case someone came to look for him because he was a former Nazi SS officer. The room is selfcontained and sealed off from sound.It is also shown that Beln, jealous of Adrins relationship with one of his violinists, Vernica, decided to pretend she is leaving him. She creates the video saying she is leaving as she hides in the secret room. The room has some one way mirrors where she can observe Adrins reaction. When she decides he has had enough she looks for the key and realizes she lost the key and is now trapped in the room with no way to contact Adrin. ........

Source: Wikipedia