Terminally ill former intelligence agent Ki Heon, encounters the first ever genetically mutated human clone Seo Bok, who holds the secret of eternal life. Ki Heon is tasked with the safe transportation of mankind's first human clone as his last mission. They become caught in dangerous situations as several forces aim to take the clone for their own agenda.
The movie reinterprets the story of Xu Fu (pronounced 'Seo Bok' in Korean) from a modern viewpoint. Xu Fu was from the Qin Dynasty and he was sent by Qin Shi Huang to find the elixir of life twice.