That Demon Within is a 2014 action/horror movie directed by renowned Hong Kong director Dante Lam.
As with many of Lam’s films, this one too revolves around a good cop and a gang of criminals. The central storyline has been tweaked by the director to show the nervous breakdown that the protagonist is going through, with bold red colors and other vivid photography. The hero Dav Wong played by Daniel Wu, then goes through a series of emotional and psychological changes as he teams up with a notorious criminal to hit back on the gang.
The action sequences are phenomenal and the cinematography is also a treat for the eyes, but overall the film is let down by a weak plot.
Director: Dante Lam
Cast: Daniel Wu, Nick Cheung, Lam Kar-wah, Chi Kuan-chun, Christie Chen, Astrid Chan, Liu Kai-chi and Stephen Au Kam-tong
Run time: 112 minutes