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.