Horse Girl is a psychological drama film starring Alison Brie. The movie follows the story of Sarah, a socially awkward woman who becomes increasingly convinced that she is a clone. As she delves deeper into her own psyche, Sarah's grip on reality starts to unravel, leading to a series of bizarre and unsettling events. With a captivating performance by Alison Brie, Horse Girl explores themes of identity, mental health, and the blurred lines between dreams and reality.