In this folk horror film, archaeologist Richard (Matt Smith) and his wife Juliette (Morfydd Clark) move to his ancestral home, Starve Acre, with their son Owen. As Owen begins to exhibit disturbing behavior and claims to hear eerie whistling sounds, Richard investigates the local folklore surrounding an ancient oak tree on their land. Directed by Daniel Kokotajlo and based on the novel by Andrew Michael Hurley, the film delves into the dark and sinister forces that haunt the family.