Flawless (2007)

Set in London during the 60's, the story follows Laura Quinn, an executive working in the most important diamond company in the world. She is very professional, but despite her performance, she notices that the prevailing chauvinism does not allow her to grow. So she allies herself with the janitor Hobbs, a veteran who proposes a perfect plan to make a big robbery to the company. With two brilliant performances by Demi Moore and Michael Caine, this thriller is very entertaining and intriguing to watch.