An unknown man was constantly hunting and suffering from hallucinations, which drove his violent nature. He was arresting women and beating them to death cruelly. At the same time, a woman used her knife to lure men to violence. Driven by the same force, the fate of the killer is intertwined with the suffering of the opposite sex. The two must fight to the death in a desperate battle, in which they were forced to reveal the terrible truth behind their addiction to murder. "Barbarian" adopts an interesting method in visual effects, which has drawn great influence from the western "Grindhouse" film. It uses filters to make the picture look rough, broken, and accompanied by light and color fluctuations. Unfortunately, the visual style was ultimately misled because it did not imitate any other aspect of the "Grindhouse" style except the application of filters. Although trying to smear the film, it is obvious that it was shot digitally. Photography technology is also one step higher than the production of most "Grindhouse". Takashi Hirose has proved his talent in photography. The exterior scenes shot in a small space have good viewfinder, lighting and transition. The decision to add effects to the work has damaged the image of the film, and even gave people a sense of despair, trying to catch some nostalgia with the audience, rather than relying on their own strength. Unfortunately, a creative choice can cause so much damage to a work. The story of "Cruelty" is very simple, but it is very effective. It does try to make some social comment on the nature of violence of men and women, but it does not provide enough depth to prove that the amount of violence displayed is reasonable. The film does end with a strong tone. There is an interesting turning point in it. One will make some people feel sick and others laugh at the same time. Although the nature of "Barbarian" is very simple, and those who like films that make them feel uncomfortable also like to overcome some challenges of extreme violence, "Barbarian" is an interesting and interesting challenge in this regard.