What movie is this?

Hi!

I'm trying to find what movie is this:

- it appears to be a filmed play;
- the plot is like: someone is stuck in a house with three elder people
due to a storm, broken car or anything. During the night, they start to
play Q&A games and the 3 elders come to the (wrong) conclusion that the
visitor comitted a murder. They start to lead the visitor crazy with the
false accusations up to the point where he thinks he is guilty.
- the film/play has only these 4 characters.

Sorry I can't give more details. Someone told me about this and couldn't
provide further information. I got interested in the story.

Thanks for any help!

Best Regards,

Roberto

ps, please carbon copy my e-mail address (racm@centroin.com.br)