It tells the story of a rare criminal who signed a public murder contract with a reward of 20 billion won after being released from prison.

Zhao Zhenxiong plays Bai Zhongzhi, a police officer who must protect heinous criminals from citizens seeking bounties.Yoo Jae-myung plays the murderer Jin Guo-ho who has been released from prison for 13 years, and Kim Moo-yeol plays Jin Guo-ho's legal representative Lee Sang-bong.

Lee Kwang Soo plays Yoon Chang Jae, a butcher trying to find his lost money.Xu Guanghan plays the killer Mr. Smile%. His father is Korean and his mother is Chinese. He is entrusted by others to come to South Korea.

It opens with a man named Changcai, covered in blood, hiding somewhere, trying to escape a butcher trying to cut off his ear.At the same time, a roulette wheel spins and three results appear - the name of the victim, the cut ear, and a reward.The attacker appears to be Chang Cai's friend and was forced to complete the task for money.Baek Joong-sik (played by Zhao Zhenxiong) is a police detective who pursues the scammer after being deceived.He and his wife were worried about losing their house to fraud.Zhongzhi failed to get a loan at the police station. He received an emergency call from the hospital and found an injured patient Changcai.Changcai's ear was cut off, and police saw the man who put him down holding the ear on CCTV.

Zhongzhi and Park Eunjing found the situation strange, but Zhongzhi wanted to avoid the case.The boss forces him to investigate.As a result, Zhongzhi came to the house of the butcher who cut off Changcai's ear and found that the butcher fell and died during the chase.Before meeting the criminals, police found a marked bag.During the chase, the Butcher fell and died.Later, he returned home, opened the car and found the bag.He opened it and there was a large amount of money inside.Meanwhile, Changcai returns to the butcher’s house to look for the bag.Through CCTV, I learned that the police had stolen it.The next morning, Zhongzhi's wife was very happy to see the money.To avoid raising suspicion, the police declared the perpetrator dead and closed the case.Soon after, Eun-jung tells the police that Chang-jae has disappeared from the hospital, and Joong-sik successfully convinces the junior police officer not to investigate.

Jung-sik realizes there may be trouble and discovers that the money comes from a dangerous online game called Roulette.A man wearing a mask spins a roulette wheel to assign tasks during the live broadcast, and when completed, he receives a huge bonus.The police decided to catch the man.On his instructions, police came to the stadium and he launched balloons into the stadium.In the chaos, Zhongzhi tried to take the lead.After the balloons burst and cash spilled out, the masked man went live again after the chaos subsided.The next target is Jin Guohao, who will be released from prison in three days and the reward is 20 billion won.

Kim Kwok-ho, a serial rapist who murdered his last victim.He was sentenced to 15 years in prison but served only 13 years due to good behavior.Jin Guohao is about to be released in three days, but he has become the target of public criticism.The police are in trouble when a masked man announces a 20 billion won reward for killing Kim Kook-ho.Now, they not only have to protect a murderer, but also control the emotions of the people.Jin Guohao, on the other hand, behaved like a good person in prison and had done volunteer work in prison.The police seemed to be looking for a reason to protect a criminal.

Joong-sik and his team arrive at the prison to escort him out on his release day.Kim Kwok-ho didn't understand at first why a team of police officers wanted to make sure he got home safely.Zhongzhi told him that there was a large group of people outside who wanted to kill him.A confused Jin Guohao argued that he had served his sentence.However, the police did not tell him the real reason and it seemed they were frustrated while following an order to protect a criminal.After much hardship, the police successfully escorted Jin Guohao from prison.He later learns there is a bounty on his head and why people want to kill him.Meanwhile, the case is in the national news, with judges and prosecutors weighing in on the criminal's protection.

After Jin Guohao returned home, he apologized to the victim in front of the camera, but showed his evil side in front of the police.He was under house arrest and Zhongzhi encountered problems.Changcai was looking for a cash bag near the police car. Jin Guohao caused trouble for Zhongzhi and the team. He got drunk and caused chaos, and the police arrived to deal with it.The mother of one of Jin Guohao's victims prepares for revenge. After Zhongsik arrives at Jin Guohao's house, Jin Guohao convinces the police to escort him to the mall.The crowd and media followed, and the mother looked for an opportunity to assassinate Jin Guohao.Police were able to protect him, but one officer was injured.It ends with someone dropping off a bag with the same logo in front of my mother's house.