Barrel

Chun Moonsoo, the leader of the Jinhong criminal organization, has a secret weakness: his daughter, Heemin. He has raised her in private, confining her life to a single apartment. Many have been assigned to safeguard her, but Moonsoo would dispose of anyone who lets her step outside. That is the warning that Nam Eunho receives as she reports to her new job.

Eunho is a spy planted by a rival faction, instructed to murder Heemin when the time is right. However, Heemin is both incredibly beautiful and completely unhinged, and Eunho takes pity on her, wondering if she will have the strength to act when the order is finally issued.