Don't Say a Word (2001)

You want what they want, don't you... I'll never tell... any of you.

When the daughter of a psychiatrist is kidnapped, he's horrified to discover that the abductors' demand is that he break through to a post traumatic stress disorder suffering young woman who knows a secret...

A group of thieves steal a rare gem, but in the process, two of the men double cross the leader of the thieving group, Patrick, and take off with the precious stone. Ten years later, prominent psychiatrist Nathan Conrad is invited to examine a disturbed young woman named Elisabeth. Patrick immediately kidnaps Nathan's daughter, forcing Nathan to attempt to get Elisabeth to reveal a secret number which will ultimately lead Patrick to the whereabouts of the precious gem that has eluded him.

...I'll never tell.

Stars:
Michael Douglas, Sean Bean, Brittany Murphy, Jennifer Esposito, Famke Janssen, Oliver Platt