When a woman happens to be caught in a trap, a man rescues her and takes her to his flat.

The drama 'Descendants of Unicorn', which is in crisis due to a series of drop-offs by male actors. Staffs who cannot stop airing will start an emergency meeting.

Honed from childhood into a merciless killing machine by a criminal organization, assassin Sook-hee is recruited with the promise of freedom after ten years of service. However, secrets from her past destroy everything she’s worked for and now she embarks on a roaring rampage of revenge.