The movie was from a few years ago, and maybe an undercover cop goes to a house and then is taken hostage by the people there. They put him in the basement and every day someone brings him a phone and a briefcase and he is told what to do with the item in the briefcase. He ends up torturing himself.
Update:
There is only a man in the basement, no woman. The last briefcase he gets has a gun in it, and he ends up killing someone else so that he can escape.
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isnt that a saw film?
Its the first Saw
http://www.imdb.com/title/tt/
Sounds like it could be saw??