I am trying to remember an obscure movie which I saw once perhaps 3 maybe 5 years ago, or less, probably not more, trouble is, I can remember so little about it, apart from a couple of fleeting fragments of plot.  Here's what I can remember, I think, but might be intermixed with other movies!  Can anybody suggest solutions to this conundrum?

  I think it was set in a desert sort of place, or maybe a very grey town, or something.
  I think it was something to do with limbo, purgatory that kind of thing
  People arrived on a bus
  They couldn't leave
  The main character found a way out by, breaking through a wall, digging through it, a tunnel, something, into a country house, or kitchen, or bakery, something like that.
  It had to be kept a secret that he was digging.
  Eventually people found out I think.
  There might have been some "bringing of the outside in", maybe was sneaking baked goods "down", damn I'm grasping here.

This might be the clincher, I think the character started digging out the wall because they could hear music through the wall.  Something about music.  Maybe there wasn't music in the place or something.

Crazy I know, but it's been doing my head in for ages trying to remember this damn movie.