[3][4] Set in 2004, the film revolves around Detective Ma Seok-do, who tries to control the gang-wars between Chinese-Korean gangs while also dealing with a ruthless loan shark named Jang-Chen.

The film is based on a May 2004 incident in the Chinatown of Garibong-dong, Guro-gu, Seoul when 14 Chinese-Koreans from the "Wang Geon-i faction" were arrested on charges of attempted murder, and an April 2007 incident in which 7 members of the Yanbian organization "Heuksa-pa", also based in the Garibong-dong, were arrested and 26 were indicted without detention.

Jang Chen, bloodthirsty leader of the Chinese loansharking Black Dragon Gang, makes his own brutal moves to take over Chinatown along with his henchmen Sung-Rak and Yang-Tae.

Ma and Jeon learn about Jang Chen's crimes and plan to arrest him.

Detective Ma seeks the help of Chinatown citizens for help to catch the Chinese loansharks.

One of the police officers named Kang Hong-seok, sees Jang Chen and pursues him.

The gang leaders are arrested and Jeon is congratulated by the commissioner where Ma and his team celebrate for solving the case.

[25] Ma Dong-seok, Choi Gwi-hwa, Park Ji-hwan, Heo Dong-won, and Ha Jun reprised their roles.

[27] It was remade in India as Radhe by Prabhu Deva, starring Salman Khan in the title role.