That Demon Within is a psychological thriller film directed by Dante Lam. The story follows a police officer named Dave Wong who accidentally saves the life of a notorious criminal during a shootout. After the incident, Dave starts experiencing strange and violent urges, leading him to believe that he may be possessed by the demon that inhabits the criminal.
As Dave struggles to control his dark impulses, he becomes increasingly paranoid and begins to question his own sanity. Meanwhile, the criminal he saved continues to wreak havoc, putting Dave and his colleagues in danger. The film explores themes of guilt, redemption, and the thin line between good and evil.
That Demon Within features intense action sequences, suspenseful moments, and a gripping storyline that will keep viewers on the edge of their seats. With stellar performances from the cast and a haunting score, this film is a must-watch for fans of the thriller genre.