Late at night in the streets of Seoul, taxis are frequently plugged with cards of call girls with phone numbers written on them. Former detective Chung-ho (played by Yun-seok Kim) has a group of call girls under his command. He seems to be rude and barbaric, and seems to be unreasonable to the sisters. Recently, the sisters under Chung-ho have frequently disappeared, and he believes that someone deliberately abducted them. Furious, he flipped through the register to find clues, and finally determined that a suspect's phone number ended with 4885. It happened that this call came in at this time and needed a call girl. Chung-ho asked Mi-jin (played by Yeong-hie Seo) to go. Mi-jin, who was lying in bed with a fever at home, wanted to refuse, but she couldn't resist Chung-ho, so she left her seven-year-old daughter at home and went out. Chung-ho asked her to remember the other party's address and tell him by text message, and told her not to mess it up. Chung-ho also followed at the same time, trying to catch the abductor. When Mi-jin followed 4885 Chi Ying-min (played by Ha Jung-woo Ha) into the room, she found that it was too late. In this place without any signal, Chi Ying-min wanted to brutally kill her... Chung-ho, who lost contact with Mi-jin, began to look for her everywhere. After encountering Chi Ying-min by chance, he determined that he was the murderer based on the blood on his body. After chasing him, he took him to the police station. However, the indifference and incompetence of the police and Chi Ying-min's amazing calmness made the case unsolved. Chi Ying-min said that Mi-jin might also be alive, but Chung-ho never gave up the hope of finding Mi-jin and desperately chased her.