In Chinatown, law and order is turned upside down when a trio of feral Chinese gangsters arrive, start terrorizing civilians, and usurping territory. The beleaguered local gangsters team up with the police, lead by the badass loose cannon Ma Seok-do, to bring them down. Based on a true story.

The 'Beast Cop' Ma Seok-do heads to a foreign country to extradite a suspect, but soon after his arrival, he discovers additional murder cases and hears about a vicious killer who has been committing crimes against tourists for several years.

Detective Ma Seok-do changes his affiliation from the Geumcheon Police Station to the Metropolitan Investigation Team, in order to eradicate Japanese gangsters who enter Korea to commit heinous crimes.

'Monster Cop' Ma Seok-do investigates an illegal online gambling business led by a former STS Baek and an IT genius CEO Chang. Ma proposes an unexpected alliance to Jang and begins hunting down the criminals.

With the fifth installment of The Roundup, the franchise heightens its suspense and thriller elements, amplifying its thriller edge while maintaining the explosive action that defines the series. This time, Monster Cop MA Seok-do faces a new and even stronger villain whose ruthless presence raises the stakes to unprecedented levels. Balancing high-impact action with tense, edge-of-your-seat moments, the film continues to showcase why The Roundup is Korea’s most dynamic and globally recognized action series.