Hey, remember Shane Carruth? After delivering arguably the most thoughtful if obtuse time travel movie to date with 2004's Primer, the writer/director/producer/editor/actor/composer abruptly stopped doing all those things, presumably to give everyone some time to digest what exactly happened in Primer. Eight years later, he's finally back with Upstream Color, a new film set to premiere at Sundance and described thusly: "A man and woman are drawn together, entangled in the life cycle of an ageless organism. Identity becomes an illusion as they struggle to assemble the loose fragments of wrecked lives." So you will probably have to watch this multiple times to really get it, too.
Here's the film's poster, as well as a couple stills. Does Upstream Color involve ice water, you ask? Ask no longer! It fucking does!