The movie tells a true story concerning a 70-year-old fisherman who committed kidnapping and murder against four women in South Korea back in 2007. The narrative is simple, centering primarily on Pan Gon, an elderly man who appears gentle but harbors psychopathic tendencies, with very little insight offered from the point of view of those he victimized. Although the characters are presented effectively, the film doesn’t have many scenes that generate excitement and lacks a thorough exploration of both the killer's background and that of his victims, which results in some sequences feeling somewhat lifeless. The arrangement of events is readily understandable, but it would have benefited from a greater emotional resonance with the victims and a more significant opposing force to Pan Gon’s personality. Certain key aspects, like what drove him to commit these crimes and the influence of his mother, seem insufficiently developed. Giving more attention to those areas might have made for a more captivating and well-rounded film. In conclusion, it's an interesting movie but not appropriate for audiences including children. It serves as a reminder to exercise caution when dealing with people you don’t know, refrain from freely disclosing personal details, and be aware that someone’s outward appearance might not reflect their true nature. Being careful and observant is particularly important in situations where you are unfamiliar with your surroundings.

Source on TMDB