In the aftermath of a personal tragedy, Harper (Jessie Buckley, The Lost Daughter, I’m Thinking of Ending Things) retreats alone to the beautiful English countryside in search of a place to heal. But someone—or something—from the surrounding woods appears to be stalking her. What begins as simmering dread soon becomes a fully-formed nightmare, inhabited by her darkest memories and fears in visionary filmmaker Alex Garland’s (Ex Machina, Annihilation) feverish, shape-shifting new horror film.