A family gathers at a large Cornwall house for a Christmas reunion. Matriarch Sophia and sister Iris are joined by Art, her son, and Lux, whom they believe to be Art’s girlfriend, Charlotte. Art has paid Lux to pretend to be Charlotte during Christmas. Sophia is haunted by visions of a disembodied child’s head that follows her, while Iris, in her 70s, is one of the original Greenham women. Art is a nature blogger manipulated by the real Charlotte. Lux, a Croatian, struggles to maintain her role as Charlotte. Like a character in a Shakespearean romance—with many references to “Cymbeline”—Lux magically brings together Art, Iris, and Sophia.