This film is directed by Lee Sang-yong, starring Ma Dong-seok, Son Seok-koo, and Choi Gwi-hwa. The Roundup begins 4 years after the sweeping operation in Garibong-dong, Detective Ma Seok-do along with Captain Jeon Il-man and his team head to Vietnam to extradite a suspect, but soon after his arrival, he discovers additional murder cases and learns about Kang Hae-sang, a vicious killer who has been committing crimes against tourists for several years for money.