After a too-long delay, writer/director Shane Carruth is back with a follow-up to his time travel indie flick 'Primer.' The first trailer for 'Upstream Color' is mesmerizing and intense, and certainly appears to be a worthy sophomore effort.

We are so, so in love with this short trailer for Shane Carruth's 'Upstream Color.' The film was recently announced as an official selection for the upcoming 2013 Sundance Film Festival, and like 'Primer,' this movie looks like it's going to blow your damn mind.

The film's official synopsis:

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.

That sounds wonderfully existential, and the dreamy and foreboding trailer below seems to verify that this is the kind of movie that's going to leave you chewing on its themes and suggestions for days after. 'Upstream Color' stars writer/director Shane Carruth and Amy Seimetz ('The Myth of the American Sleepover') and according to IMDB, the release is set for sometime in March, which means we're likely to see this flick hit at the SXSW film festival as well.

Check out the first trailer below, featuring some interesting imagery and a beautifully intense score:

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