The Roundup is a South Korean action-crime film that continues the story of detective Ma Seok-do, a strong and straightforward police officer known for his determination and sense of justice. Set several years after the events of the previous film, the story begins with Ma and his team traveling to Vietnam to extradite a Korean criminal. What seems like a routine task soon leads them to uncover a much larger and more dangerous criminal operation.

While in Vietnam, Ma learns about a series of kidnappings and murders targeting Korean tourists and businessmen. These crimes are connected to Kang Hae-sang, a ruthless criminal who operates across borders and shows no fear of the law. Unlike ordinary criminals, Kang is unpredictable and extremely violent, making him a serious threat not only to his victims but also to the police trying to stop him.

After Kang escapes to Korea, Ma Seok-do and his team return home and begin an intense investigation. The film follows their efforts to track Kang down, using both traditional police work and Ma’s physical strength. Although Ma often relies on force, the movie also shows his loyalty to his team and his strong belief in protecting innocent people.

The conflict between Ma Seok-do and Kang Hae-sang forms the core of the film. Kang represents chaos and cruelty, while Ma represents order and justice. Their confrontations are tense and dramatic, highlighting the contrast between a criminal who enjoys causing fear and a detective who refuses to back down, no matter how dangerous the situation becomes.

Beyond the action, The Roundup also touches on themes of responsibility and justice in a modern society. It shows the challenges police face when dealing with international crime and powerful criminal networks. The film suggests that cooperation, courage, and persistence are necessary to fight such threats effectively.

In the end, The Roundup delivers a satisfying conclusion where justice is served, though not without difficulty. The film combines action, crime, and moments of dark humor, making it both exciting and engaging. Through the character of Ma Seok-do, the movie presents a story about standing firm against evil and protecting society, even when the odds seem overwhelming.