Gap Dong

Moo Yum's father killed himself twenty years ago as he was suspected to be the Gap Dong in a serial murder case. Now, Moo Yum became a detective in order to capture the real Gap Dong, but is forced to give up due to the expiring of statue of limitations and resigns thinking that the real killer is dead. When new clues appear in front of him, he sets out once again to capture him.