Daphne du Maurier’s short story, also the basis for Alfred Hitchcock’s classic film, is a boldly adapted thriller by Conor McPherson—a gripping, unsettling, and moving look at human relationships in the face of societal collapse. In an isolated house, strangers Nat and Diane take shelter from relentless masses of attacking birds. They find relative sanctuary but not comfort or peace; there’s no electricity, little food, and a nearby neighbor, Tierney may  be watching them. Another refugee, the young and enthusiastic Julia, arrives with some news of the outside world, but her presence also brings discord and forces all three of them to examine the role love now plays in their lives. Their survival becomes even more doubtful when paranoia takes hold of the makeshift fortress—an internal threat to match that of the birds outside.