this was a Broadway play that Kerry Washington was in that they adapted for a film. they kept it just like it was on Broadway with the exact same cast from the play and it's set in a single location. it's about a mom who's in a police station in the middle of the night looking for her son. the entire thing takes place in a police station waiting room. here's the trailer.

https://www.youtube.com/watch?v=dbKZlSwAS3M