No Mercy

Yongseoneun eupda is a movie starring Kyung-gu Sol, Seung-bum Ryoo, and Hye-jin Han. Despite being nearly proven the murderer, a serial killer threatens to kill the daughter of a forensic pathologist if he doesn't get him bailed out.
Forensic pathologist Kang is assigned to examine the dismembered corpse of a female murder victim. Detective Min points to a fanatic environmentalist, Lee Sung-ho, as the primary suspect. But when Kang’s daughter is kidnapped, a manipulative game begins between Kang and Lee, who holds secrets about the homicide case.