SYNOPSIS: Witnessing the death of his mother created a lifetime grudge on Soo-hyeon. He left his childhood friend, Ji-woo, to live with his mother's friend in Korea. There he grew up close to Min-ki who he considered as his own brother. They became NIS agents like their parents. Soo-hyeon is better but his judgment got impaired when he met his mother's killer who turned out to be the big boss of a syndicate. All he wanted was to take revenge so the NIS took advantage of his situation. They staged his death and changed his identity to Kay so he could penetrate the syndicate world. He earned the trust of the big boss after saving his life twice.

Ji-woo was devastated to learn about Soo-hyeon's death. Min-ki tried to console her and eventually had a chance to become closer to her.

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During his mission, Soo-hyeon, had an accident and lost his memory temporarily. He still continued to serve for the syndicate but doesn't remember anything about being an agent. He came back to Korea as a different person and because Ji-woo is the big boss' daughter, they get to be together more often. Since Kay looks and acts like Soo-hyeon, she always gets sidetrack and forgets about Min-ki. Min-ki became suspicious of Kay's character so he investigated on his background. To his surprise, Soo-hyeon is still alive.

Soo-hyeon and Min-ki helped hand in hand in getting all the evidences against the syndicate but they cannot do anything drastic because of Ji-woo. But truth prevailed and Ji-woo found out about his father's wrong doings.

Finally, Soo-hyeon was able to do what everyone was hoping for - to let go of the past.

REVIEWS: I like the story and the characters. The excitement doesn't end. I even like the love interest between the three. I guess whoever you pair with Sang-mi will definitely work out because of her sweet character. Sang-mi definitely has a thing with agents.