A young governess is employed to look after two orphaned siblings in a grand country house. Isolated and inexperienced, she is at first charmed by the children – but gradually suspects that they may not be as innocent as they seem. She soon begins to see sinister figures at the window, but do they exist solely in her imagination, or are they ghosts intent on a terrible and devastating task? The Turn of the Screw by Henry James is one of the most famous and eerily equivocal ghost stories ever written.