Dogs: Abandoned Children (2020)

Ten years ago, a tragic incident occurred in the heart of downtown Seoul where a teenage girl was killed.
Detective Go Tae Seong, who was in charge of the case, couldn't find even a small clue to the criminal.
It ends up as an unsolved case. Ten years later, another high school girl was kidnapped.
Detective Go Tae Seong instinctively goes out looking for the killer.