A story about love and heartbreak, sadness and self-preservation.
A naive, cheerful albeit, somewhat of a recluse writer, Han Ji Eun (Song Hye Gyo) is swindled out of everything she owns. Not by strangers, but her best friends! Stranded in China, she is determined to get home with the help of an actor, Lee Young Jae (Bi). She borrows money from him after coming up with a clever lie and plans to pay him back after landing in Korea, only to find that all which is precious to her has been sold. In an attempt to get her possessions back, she has entered in a contract marriage with Young Jae for one year. It is quite simple, until strong feelings start to develop. Everyone around them test the "love" Young Jae and Ji Eun have for one another.
In spite of it all, Ji Eun manages to be humorous and endearing - even when her heart is breaking.
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.
Growing up as the best of friends, Sang-doo (Bi) and Chae Eun-hwan (Gong Hyo Jin) make lots of lasting memories during their shortened high school years. When Eun-hwan's family goes into bankruptcy, debtors rush into their house to grab all of her family's belongings away. When somebody takes her father's old record player that she really loves, Sang-doo goes after the guy. In a physical fight, the man falls off the bridge and enters a coma. Eun-hwan, not knowing this, runs away from the town. Sang-doo goes to jail, returning to find out that his family and Eun-hwan have left him. Years later, he becomes a gigolo (with his uncle) in order to raise the hospital bills for his sick daughter (Se-ra (Hong Soo Hyun) claims that Bori is her daughter). Eventually, he meets his long-lost first-love, Eun-hwan as a high school math teacher. In an effort to never lose her again, he returns as a high school student (to finish his last years of high school) and gets placed in Eun-hwan's class. In numerous funny yet heart-touching moments, Sang-doo vows never to become a gigolo again. Yet, his past deeds have caught up with him, and he is soon sought after by the police. Eun-hwan's boyfriend, Min-suk (Lee Dong Gun), also does not want to let go of Eun-hwan. First love is something beautiful yet painful to these two lovers, who have reunited after ten years to find out that everything is not the same anymore.