[5][6] Set 4 years after the previous film, Detective Ma Seok-do travels to Vietnam to extradite a suspect, but comes across some gruesome murders of Korean tourists by a vicious killer named Kang Hae-sung.

Four years after the sweeping operation in Garibong-dong, Detective Ma Seok-do and Captain Jeon Il-man head to Ho Chi Minh City, Vietnam to extradite a suspect Yoo Jong-hoon.

Ma and Il-man leave for Jong-du's hideout, only to find him dead, where they learn about the duo's involvement with Kang Hae-sang, a vicious killer who has kidnapped and killed Koreans and several tourists, in exchange for money.

Ma, Il-man and Park Chang-su (the resident officer at the consulate) dig into the garden, where they find Choi's body, but the local police warn him to halt the investigation.

After the duo land in Korea, Ma interrogates Jang I-soo, who is alive and now running an export service, where he learns about a recently arrived smuggling boat.

After learning that Kang's case have been handed over to the Foreign Affairs, Ma and Il-man convince their superiors and receive a week deadline to catch him.

After driving at the parking lot of a shopping complex, Jang I-soo escapes with the money, leaving In-sook behind while Ma and his teammates subdue Kang's two associates.

Unlike the film in which the perpetrators are punished, the real incident has not been solved completely due to the unconfirmed number of victims and the uncertainty of Yoon's final fate.

[19] The film was banned from screening in Vietnam by censorship authorities on the grounds that "there are too many violent scenes" while some speculated that it might be because of the negative portrayal of Vietnamese Ho Chi Minh City in the movie.

[33] James Marsh of South China Morning Post gave 4 stars out of 5, and praised Ma Dong-seok's performance as "a truly unique, utterly captivating leading man.

"[35] Xports' Kim Ye-eun appreciated the direction of the action sequences presented by the main character Ma Seok-do and the villain Kang Hae-sang.

[36] Whang Yee Ling of The Straits Times rated the film 3 out of 5 and wrote, "Lee and his returning teammates share slapstick camaraderie, and their investigation maintains rambunctious energy to climax in a thrilling extended car chase.

"[37] Dennis Harvey writing for Variety appreciated the direction of Lee Sang-yong and praised the comic elements of the film, stating "the movie manages with deceptive ease, maximizing both humor and extreme harm.

"[38] Several organizations dedicated to the rights of disabled people criticized the film for fueling prejudices by depicting a character with a mental disability as a danger to the public: a scene in the beginning of the film where a man escaped from a mental hospital, threatens the police and public with a knife as he holds two women hostage inside a supermarket.