4 PM (2000)

Belinda Douglas is a famous politician who is attacking the government on not being transparent enough. She's married to Jack, but has not always been faithful. Today she can't resist the urge either and picks up Jenna as one-night-stand. The next day Belinda has to leave early and tells Jenna where to find the keys. But the keys accidentally fall behind the door and Jenna is locked inside. As time is running out, she decides to check some personal belongings of Belinda. Then fate strikes.