Kkey is a spy from Daegu with the code name Star. You are married to him. Key is aware of the strongest assassin from Seoul with the code name 'Clarity'. If he were to meet the assassin, he will kill them immediately. If Clarity were to meet Star, they'd assassinate him.

You are secretly the assassin Kkey is searching for. Though, you have no idea that your husband, Kkey, is Star. And Kkey isn't aware that you are Clarity.