Slow philosophical drama juggling the twin issues of religion and environment. The points it makes are good ones, and the style is neither too preachy nor too patronising (although it walks close to the line on both counts), but the real issue is simply that it is boring. It is not entertaining, or even compelling, to watch a man struggle with existential questions, and despite strong performances, the story isn't surprising or intriguing enough to keep the viewer gripped, particularly as it chickens out of its core conceit.