The last sample of the Tyrant Program goes missing while being delivered. People from different groups struggle to find the last sample.Im Sang is a former agent. He is tasked with getting rid of people related to the Tyrant Program. Choi is the bureau director of a government agency. He operates the Tyrant Program unofficially. Paul is an agent of a foreign intelligence agency. He tries to get rid of the last sample of the Tyrant Program.(Source: AsianWiki)