Three years after the synthetic drug case roundup in Korea, Monster Cop Ma Seok-do (Don Lee) and Metro Investigations are busy chasing down criminals who are dealing drugs through a delivery app, when the app distributor is found dead in the Philippines. The team soon realizes that this case involves a huge illegal online gambling business.

In the Philippines, ex-special forces mercenary Baek Chang-gi (KIM Moo-yul) monopolizes Korea’s illegal online gambling business by means of abduction, confinement, assault, and even murder. Meanwhile back in Korea, IT genius CEO Chang Dong-cheol (LEE Dong-hwi) is hatching even bigger plans. Detective Ma reaches out to Jang I-su (PARK Ji-hwan) for help, and with support from the Cyber Investigations team, Metro Investigations begins to roundup some criminals.

THE ROUNDUP: PUNISHMENT is a production of BIGPUNCH PICTURES, HONG FILM, and B.A. ENTERTAINMENT, and K-MOVIE ENTERTAINMENT handles international sales. International and German press are handled by mm filmpresse.