A terrifying curse spreads like a virus through a single, haunting gesture in this chilling horror film from writer-director Parker Finn. Dr. Rose Cotter, played by Sosie Bacon, is a dedicated psychiatrist whose orderly life is shattered after witnessing a bizarre and traumatic incident involving a patient. The patient, gripped by an unexplainable terror, dies by suicide while flashing a wide, unnerving smile directly at Rose. Soon after, Rose begins experiencing frightening visions and encounters with entities who wear that same, sinister grin, forcing her to question her own sanity. As the phenomenon escalates and those around her, including her fiancé Jessie T. Usher and her supervisor Kal Penn, grow increasingly concerned, Rose must race to uncover a dark, supernatural truth behind the contagion before she becomes its next victim. The film masterfully builds an atmosphere of pervasive dread, exploring the horror of a threat that is both deeply psychological and horrifyingly real, stalking its prey with a smile.