Kim Hyun Joong    He belonged to a secret non-government organization who hunts the corrupt and evil people on the city. He is strong and a Master of judo. He is Intelligent. His Father, a Militar, died saving the country from the bandits. His Uncle from his Father side took him away from Korea  and  brought him to Thailand. He was raised by his Uncle, telling him that his mother had already died. He was trained for the secret organization. He is Stone-hearted... and He is not allowed to fall inlove, or else They will Kill Him. He works under the Blue House as an IT security.

Park Shin Hye  She works double for her sister who has Leukemia. She works under the Blue House security too. She is Jolly and happy, but she is Serious on her work because it is Her father's former work. She is poor, but she works hard for herself, and mostly for her sister.

Kim Jaejoong   He is the Head of Blue House security . He is also the special investigator to investigate about the secret organization.

Seohyun   She is the Sister of  Park Shin Hye. She is the one who has Leukemia. She is under the state of comma. She is cute nice and innocent , She really love her sister not wanting her to suffer because of her

Ji Jin-Hye    Hyun joong's Uncle. He is one of the leaders of the so-called Secret Organization. He is cruel, for He wants to kill all the officials who killed his brother. But Kim Hyun Joong doesn't let that thing happen because he wants them to be punished only by law.

KIm Bum . He is one of the partners  and buddies of Kim Hyun Joong. He was From Indonesia. He is serious but sometimes funny. One of the members of so called secret organization. He is an orphan his parents died when they are still on Kuwait. Since, His relatives brought  him  in Indonesia . Where the organization trained him. He is the playboy of the group. And the gentleman

Jung Yong Hwa. He is also one of friends and partners of Kim Hyun Joong together with Kim Bum. They will soon called The Triad because they are the strongest people of the organization.  He is funny but in terms of their mission sometimes he makes fun but most of the time he is serious.  He was trained in their main base which is located in Korea

Choi Siwon. He will Join the first Battle of Triad . He is arrogant and he hate people who are stronger than him. Along with Yonghwa he was also trained in Korea

Kim So Eun. She is bestfriend of Park Shin Hye. She came from a wealthy family . Their family business is about chemicals. Even she looks tough and strong. She have dark past about her boyfriends. She love them with hearth but they just cheating on her. She knew her lesson so she hates playboy and arrogant guys.

What will happen if the stone-hearted guy meets the strong girl?

Can She change Him for the better?

Will He change for Her sake?

" I am here to take revenge and put down all the evil people that killed my father"

"I'll wok hard for my sister, and for my father's dignity "

"If you Dare to fall In love Kim Hyun Joong, I'll make sure that she will die"

" I won't let that thing Happen"

" Your surroundings will be filled with blood, and I will kill you with her"

"What  ever happens I love you and I will wait for you"

" Sorry, I don't love you. Look someone better"

" I know after this, everything is going to be alright. I'll keep on waiting for you"

Friendship,Love,Trust,Patience and Revenge....

Love 

VS.