This is a summary. To read the whole story subscribe to BostonGlobe.com
You know actress and filmmaker Katie Aselton and her indie auteur husband, Mark Duplass, from their work on “The Puffy Chair” and TV’s “The League.” Duplass has also been taking the occasional mainstream gig recently — see “The Mindy Project” and his supporting role in “Zero Dark Thirty.” They’ve teamed for “Black Rock,” a backwoods survival thriller, directed by Aselton and scripted (or semi-scripted, as usual) by Duplass.
You wonder: What would a mumblecore version of “Deliverance” play like, anyway? Their foray into genre work is unexpectedly sturdy in some ways, shaky in others. The story opens with 30-ish girlfriends Sarah (Kate Bosworth), Lou (Lake Bell), and Abby (Aselton) getting together for a camping weekend on an island off the coast of Maine.