If you’ve ever daydreamt about getting mega-stoned and frolicking in the woods with Kirsten Dunst, then Woodshock is your must-see movie event of the year. While the just-released first trailer is heavy on the art house vibes, that shouldn’t deter you from checking out the directorial debut from Rodarte’s sister duo Laura and Kate Mulleavy.

Dunst plays a woman who attempts to deal with her grief by ingesting what the official synopsis calls a powerful “cannabinoid drug” that leads to a “a hypnotic exploration of isolation, paranoia, and grief that exists in a dream-world all its own.”

The last time a fashion designer made the leap from the runway to the director’s chair, Tom Ford gave us A Single Man and Nocturnal Animals. That certainly bodes well for the Mulleavy sisters, who’ve reportedly been developing this idea for years.

We’ll finally get to see Woodshock in all its psychedelic glory when it opens on September 15. Watch the trailer below.