Addison Timlin is a young nun who returns home after leaving three years previously. She left when her mother attempted suicide, and returns because her brother has just been released from hospital after his time in Iraq. Her brother now has significant facial scarring, and isn't interested in seeing anyone or doing much other than staying in the guest house playing drums.
This is listed as a "dark comedy" by Wikipedia - to me, that would imply a downbeat ending, which isn't exactly the case here. The movie does derive a lot of its humour from family awkwardness. I watched it because it sounded interesting and had a 93% rating on Rotten Tomatoes, but didn't think it really lived up to that. Or perhaps it would be more accurate to say that it's very well done ... but it's not my style of humour, or my style of drama: it didn't work very well for me despite being well put together.