Jack (Mark Duplass) lost his brother a year ago, is unemployed and clearly unhappy with his life. One of his best friends, Iris (Emily Blunt), decides to send him to her parent’s cabin in a beautiful, isolated island. He will be on his own, able to reflect on himself and his future.
But when he arrives to the place, in the middle of the night, he’ll find that there’s someone already in the house: Hannah (Rosemarie DeWitt), Iris’ older sister, who just broke up with her girlfriend after a seven years relationship. They chat, drink tequila and something very unlikely happens. To complicate things a little bit more, Iris, who came to know Jack because she was his brother’s girlfriend, appears the next morning.
Most of the charm of ‘Your Sister’s Sister’ resides on just watching these three characters talking and interacting with each other, particularly the ones played by Mark Duplass, who’s funny and warm, and by Rosemarie DeWitt, who keeps an aura of mystery that is enough to keep the thrill going.
The first half of the movie works wonderfully as a funny comedy with a touch of drama and deeper-than-they-look meditations. But then director Lynn Shelton starts messing things a little bit more, introducing an unexpected twist that bring new conflicts and moral dilemmas. Some people may find this second half of the film the most interesting one, as it actually presents more thoughtful problems and makes for a more complex plot, but it somehow breaks the smooth pace of the first half.
All in all, what I think that will remain of this movie is the authenticity of the characters and some situations, over a slightly twisted and unlikely plot. Keeping the movie in a lower key would have made it perfect in its own way.
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