A love story revolving around the game world and reality. Kim Joo Won (Jang Hyuk) is a chaebol who operates a department store, his arrogant personality changes after he meets a woman named Ra Im (Ha Ji Won).

Lee Soo Jin is an actress that used to run away from her problems before getting famous. Her first love was Hyun Soo, a sushi chef from Korea. Seven years have passed since Soo Jin last saw Hyun Soo and she can't forget about him.

In A Love to Kill, Bi/Rain/Jeong Ji-Hoon plays a tough guy as the role of a K-1 Fighter, Kang Bok-gu. Bok-gu is a character who is dynamic in nature and grew up in a foster home. He falls in love with a woman whom he should not love. It was because of the woman, his emotionally-wounded brother fell off from the rooftop and became a human vegetable. So, his love is forbidden and inevitably tragic.

The woman is Cha Eun-seok (Shin Mina) who is a TV talent and movie actor. It was not that she jilted his brother on purpose, but upon a basis of misunderstanding, his hatred toward Cha Eun-soek grows more and more burning.

By becoming Cha Eun-seok’s private bodyguard, Bok-gu keeps concretely practicing his revenge upon her. He only desires ‘to bring his brother’s woman to her knees.’ He is gradually taking Cha Eun-seok to destruction, while he feels his love toward her growing deeper and deeper in his heart.

Bok-gu is a cold guy character without any special concern for woman. Martial art of hand-to-hand fighting was just kind of his escape he choose from the shock of a spinster’s death whom he loved from a distance.

More than a thousand years ago from the present time, Puyeoju is the Baek Jae Empire's princess. Unlike other princesses, she is active and skilled in the arts and in sports. When the Baek Jae Empire crumbles due to a spy, Kum-hwa, she runs away with her bodyguard General Guishil Ari and falls in love with him in the meanwhile. The new conquerer Kim Yu-suk is also in love with the princess, but only receives hate in return. In a desperate attempt to win her, he kills Ari, but the princess runs away and jumps off a cliff to kill herself. While falling, she travels more than one thousand years into the future, which is our present time of 2003. Only she remains to be who she was, and she encounters Ari to be an aimless fashion designer Kang In-chul with a warm heart and bad temper. Although he is annoyed at her ignorance of the present world, he comes to fall in love with the princess again. Fujiwara Tatsuji is the son of the Fujiwara dynasty, and once again is mysteriously attracted to the princess. Only she knows the past that holds all three of them together, but will things become an exact replica of the situation back then?