A heart-warming comedy about friendship, love and life, Your Sister’s Sister stars Emily Blunt and Mark Duplass in the new feature from Lynn Shelton. When Jack (Duplass) finds himself down on his luck, best friend Iris (Blunt) suggests he spend a weekend at her family's remote island retreat. Upon arriving Jack discovers Iris’s sister Hannah (Rosemarie DeWitt) had the same idea and the two find solace together in sharing their issues and drunkenly kiss. When Iris arrives the next morning unannounced she further complicates matters for an already confused and bumbling Jack.