The television series depicts rich young men and women in their twenties who discover their true feelings while playing the dangerous game of love. In an act of revenge, Kwon Shi Hyun makes a bet with his friends to seduce Eun Tae Hee, who believes people swayed by love are pathetic. After Tae Hee meets Shi Hyun, her view on love starts to change. As Shi Hyun’s secret deepens, he starts to fall in love with Tae Hee. Loosely based on the classic French novel "Les Liaisons Dangereuses."