Memories of Muder

In 1986 South Korea, a series of brutal sexual murders erupt in a rural, small-town corner of Gyeonggi province, rattling the sleepy community to its core. The local police department, headed in part by brash, impulsive Park Doo-Man (Kang-ho Song, J.S.A.) and his aggressive partner, does its best to investigate the crimes, but is totally unprepared to handle such foul murders.
Police work in small-town South Korea is not an exact science to say the least, and Park is used to getting things done the old-fashioned way. Intimidation, bribery, corruption, forced confessions, framings, and a good solid beating or two have been more than sufficient to handle any problem that has arisen in the small community...up until this point. But a serial killer? South Korea had never dealt with a crime of this magnitude. As much as they hate to admit it, Park and his partner are at a loss for how to proceed.
Enter Detective Seo Tae-Yoon. An experienced detective from Seoul, he ventures out into the boondocks to assist in the murder investigation, and immediately clashes with Park, who views Seo as an outsider invading his territory. Seo is calm, calculated, and analytical, totally at odds with Park's acerbic nature. Park and his partner continue to thuggishly interrogate the local townsmen, attempting to pin the crime on the local town dunce, while Seo formulates a plan to outthink the serial killer using logic and intuitive deduction. Both detectives soon come to blows over how to handle the case, each totally convinced of their superiority over the other...until the killer strikes again, and again.
Despite their best collective efforts to stop him, the killer seems consistently a good step ahead of the police. With a sickening realization, it occurs to the detectives that this particular killer might be out of both their leagues.