One of those “lots of intertwining short stories” things. It was well done, I especially liked the way the stories took place at different times, although they were shown at the same time (confused? see the movie). Lots of good acting, dialogue, etc… There’s no obvious “theme”, but it doesn’t really matter, the stories are all good enough they don’t really need a “theme”. I guess the “1 thing” might be, “What makes you happy or fulfilled?”… but that’s just a guess.