Description：In 1986, in Hwaseong County, Gyeonggi Province, South Korea, on a hot summer day, a female corpse was found by the side of a field, and it had already smelled bad. Small town police Detective Park (Song Kanghao) and Detective Su (Kim Sang-kyung) from Seoul took over the case. The only thing that could be confirmed was that the female corpse had been raped before her death. The serious lack of clues allowed the inexperienced Detective Park and his partner Detective Cao (Kim Luohe) to torture the suspect into confessing several times based on rough confession and sixth sense inference. Detective Su was objective and calm, and analyzed the case based on reasoning, and eliminated the suspicion several times. The police were constantly in conflict over proof and overturning, but innocent women were still brutally killed one after another, so they had to reach a consensus and work together. At this time, a young man (Park Hae-il) who extremely met the characteristics of the crime became the biggest suspect, and the police locked him with nervous nerves, and at the same time