Ji-wook is a cold-blooded detective who would brutally assault and stop at nothing to catch criminals. However, despite her perfectly masculine appearance, Ji-wook struggles with a secret desire to be a woman. At last, Ji-wook decides to transition. However, a gang Ji-wook brutally arrested by force plots revenge against him. While Ji-wook resigns and secretly dreams of transitioning into a woman, people close to her get caught up in a conspiracy and killed. When the one person he must protect, Jang-mi, also falls in danger, Ji-wook faces a crossroads in making his choice.
When Mong-lyong decides to take him under his wing, Bang-ja gets to share a room with the wise, MA. While sharing the room, MA teaches Bang-ja of all the arts of seduction. When strolling the park one day, Mong-lyong meets Chun-hyang, the daughter of the owner of the park, and he instantly falls in love and encourages Bang-ja to arrange a meeting with her. But Bang-ja’s feeling for her was also the same and he seeks advice from Ma. Ma tells him of Chun-hyang’s real intention to win over Mong-lyong for his social status. Without knowing, Mong-lyong urges for a second meeting with Chun-hyang. Bang-ja’s anger towards Mong-lyong for using his nobility to attract her heart triggers his plan to use Ma’s art of seduction. Successfully he wins her heart and body, but under the condition that he will help her to get married to Mong-lyong. Everything seems to go as planned but when Mong-lyong finds out their relationship, whole thing is about to go wrong.
Je-In (Ha Ji-Won) is a mystery novel writer. She chases after a serial killer with her longtime friend Rok-Hwan (Chun Jung-Myung). Rok-Hwan is a detective. A handsome and mysterious man, Jason (Chen Bolin), appears in front of them.
Yoo-Suk looks for a girlfriend who disappeared. Ae-Yeon has a fake diamond which her ex-boyfriend gave to her. Ae-Yeon was dumped by her ex boyfriend. Byung-Chan does not believe in love. Bok-Nam is in love with a friend of a friend.
The perpetually rational and precise researcher Hyeon-cheol and the rash and reckless Dong-hwa have nothing in common with the exception of a goal to steal a corpse to serve their own twisted agendas. They set off on their bizarre mission and the plan goes smoothly until they’re faced with the unexpected appearance of Jin-oh and a mysterious group of men also on the hunt.