Characters:

Junsu head of a powerful Mafia family. After living so long in the shadow in his underground life, he just wants go away, have a peaceful life. But he was too far to give up everything, and under his command, a young man named Jaejoong negotiates potent drugs and fighting rival gangs with his own hands.

Yunho: Belonging to the special squad anti drug trafficking, he performs without question the orders given to him and seeking a higher office, he goes wherever his missions take him and do as commanded without questioning.

Changmin: a young officer full of passion for his work, be a federal agent that fights drug trafficking. He was always driven by emotions and now finds himself facing the biggest fight he has ever faced: choose between his great dream of becoming the greatest federal agent who ever lived, or his friendship with a known drug dealer-Jaejoong.

Jaejoong: He is an ambitious young man at a young age was attracted to the life of promises of easy money, the black market of drugs in an underground world. It has a divine beauty and live his life being pursued by his feelings for a young federal agent who is chasing him, his childhood friend, Changmin, and fighting gangs of thugs who want his skin, which is worth much money.

Yoochun: He is the only one who knows both sides of the coin. The link between Changmin and Jaejoong, who shares the memories of that friendship since childhood.