Iris invites her friend Jack to stay at her family's island getaway after the death of his brother. At their remote cabin, Jack's drunken encounter with Hannah, Iris' sister, kicks off a revealing stretch of days.
The take
The acting... oh the acting! Your Sister's Sister is a fantastic comedy which makes great use of the amazing talents and suitability of its cast, including the criminally underused Emily Blunt. Far smarter, quicker and grown-up than most other Rom-Coms, it's a film built on secrets, lies and, yes, love, sex and family.