Ra Yi Eon’s (Taec Yeon) dream is to buy a small dumpling restaurant and run the business. She wants a quiet life, but she’s smart enough to pass the civil service exam she just took. He then begins working in the Office of Special Advisors, an elite program designed to train successful government officials. He is subsequently appointed as a royal secret agent, tasked with carrying out covert missions. It is a great honor for Ra Yi Eon and his family that he is now a royal secret agent. At home, he still leads a quiet life and doesn’t work as hard as he does as a royal secret agent; the problem is that he’s lazy, even though he’s intelligent and daring. His life changes when he meets Kim Jo Yi (Kim Hye Yoon). Kim Jo Yi’s mind is full of curiosity. She also has a progressive mindset for the Joseon period—she believes divorce is justified. She married her husband three years ago and is now trying to divorce him. Her husband is addicted to gambling and is a mama’s boy. Her husband refuses to divorce her. Eventually, just as Kim Jo Yi is about to finalize her divorce, she meets Ra Yi Eon. Royal secret agent Ra Yi Eon and Kim Jo Yi work together to solve cases; but how will their relationship develop?