A human melodrama in which a woman who is terminally ill and a man whose life is in the gutters are entangled in a murder case and become someone precious in each other's life.

Kwon Si-Hyun bets his life on a dangerous game to seduce Eun Tae-Hee. His target is 20-years-old and believes people that are swayed by love are pathetic. After Eun Tae-Hee meets Kwon Si-Hyun, her view on love changes. Based on 18th century French novel "Les Liaisons dangereuses" by Pierre Choderlos de Laclos.

Kang Han-Kyeol is a great yet sullen composer who becomes inspired by the voices of others and keeps his identity secret from people. He meets Yoon So-Rim, a high school student who possesses beautiful singing, whilst under his secret identity, and she falls in love with him. Adaptation of the manga by Kotomi Aoki under the same name, which has been running since 2009.