What is it like for a person of power to live in Korean society? Apparently, it’s like being royalty.
From childhood, Park Tae Soo yearned for power. Born in a poor family, he reigned over fellow students with his fist before he caught a glimpse of what he called “real power” -- the sight of his thug father being beaten up by a pencil-neck prosecutor. It was then that he decided to pursue a career in law, the biggest symbol of power in the 90’s. After entering the most prestigious law school, experiencing democratic resistance in Korea, Tae Soo finally reaches his goal of becoming a prosecutor, but his life is no better than a salary man. By chance, he joins a clique of the powerful prosecutors with wealth and authority. He finally gets a taste of a life of the top hierarchy, but as he enjoys the sweetness of supremacy, he also sees the cruel side of it. Tae Soo soon realizes that real power comes at a price: forfeiting one’s conscience and pride. Entering star prosecutor Han Kang Shik’s inner circle, he slowly commences on a descent into corruption and ascent to power.
Ji Wook is a cold-blooded detective who would brutally assault and stop at nothing to catch criminals. However, despite looking masculine, Ji Wook struggles with a secret desire to be a woman. When at last, Ji Wook decides to undergo a sex change, a gang, the detective had brutally arrested by force, plots revenge.
After resigning and secretly dreaming of physically transforming into a woman, people close to Ji Wook get caught up in a conspiracy and killed. When the one person Ji Wook must protect, Jang Mi, also falls in danger, a choice must be made.
Dong Chul can't fight at all, but he's a gangster who can talk. He can't show off his skills as well as before, but his spirit is still alive. But the girl who seems nice on the outside moves next door, and she doesn't feel threatened by him. If he calls her "the girl next door", she gets defensive. But for some reason, he wants to be nice to her!
Se Jin has put herself out on the job market. She has big plans and got the semi-basement room. But a gangster who doesn't even look like one lives next door. This man calls her "the girl next door" as if he knows her. The gangster that talks too much. She doesn't hate him!