A series of gruesome mruders takes the city by storm. Each crime is elaborately staged and executed with high level of skillfulness. All murders have something in common: The victims are subjects of recent media controversy when their apathetic, selfish wrongdoings cause the death of others. The way they were executed also bears resemblance to certain details of their misdemeanor. The media immediately labels it an act of vigilante justice and the whole town becomes enthralled with the serial killer. People are frantic to see his next act of gigilantism. Police detective Nam, who's been assigned to the case, is practically running out of leads and time. She enlists the help of ex-cop/forensic expert Mu, who quickly discovers invisible traces of evidence left at the crime scenes. Together they are wasting no time in hunting the killer before the next murder occurs. At the same time, the serial killer has chosen his next victim. He is plotting a live streaming of the execution for people to decide on the fate of the victim. Seeing himself as the guardian of the city, he believes true justice can only be served by transferring power from the law enforcement and giving it back to the people.
The film revolves around a pair of big-boned, bumbling cops who find themselves at the heart of a drug trafficking case. The agent "J" was shot in the head during an A-level mission, causing damage to the intracranial hypothalamus. During the period of rehabilitating, J gradually became a big fat man of three hundred pounds and suffered from severe narcolepsy, but J still considered himself a ace agent. Finally, J received the task again and went to Japan to retrieve the confidential documents. After the file was obtained, J arbitrarily opened the file and decided to continue the task of hiding the organization for the organization, but he fainted in the izakaya. J who woke up in the hospital got to know the security guard Handsome Hao, Handsome Hao to prove that he is not a waste of nothing to resolutely join the mission. In the process of carrying out the task, the temporary partner has experienced the ridiculous and dangerous crisis of time over and over.
When a woman who was abandoned at birth because of a genetic disorder sees a child facing the same fate, she finds herself trying to persuade their parents to reconsider and goes to extreme lengths to save the child.