Helmer & Son (2006)

Jess, a middle-aged man who runs the company his father started, is called to the old folk's home where his father, Helmer, lives. Helmer, it seems, has locked himself in an armoire and won't come out. He's happy to chat with Jess through the closet's locked doors, chiding his son for how he talks to a client who's called on Jess's cell phone. Shortly after, Jess's sister, Vibeke, arrives with her surly teenage daughter, Sophie. Helmer talks to Vibber as well. Why he's in the armoire, what draws him out, and Jess's response make for the rest of the story.