赵敏赫（池城 饰）是个出身显赫的富家公子，迫于家庭压力，他与女友智熙分手，与国会议员之女申世妍（李多喜 饰）订下政治婚姻，自此他便过着花天酒地的混账日子。在城市的另一端，姜友静（黄静茵 饰）过着与赵敏赫截然不同的生活，她忙碌充实，拼命打工，与交往七年的男朋友安度勋（裴秀彬 饰）即将步入婚姻殿堂。
本该不会有交集的四人，却因为一起车祸，他们的命运紧紧连接在一起。安度勋在一个雨天里意外撞死了一个人，而这个人正是赵敏赫心爱的女友智熙。为了安度勋的前程，友静替其顶罪，锒铛入狱。另一方面，因失去了深爱的人，赵敏赫发誓要用尽一切手段，向友静复仇。四名男女的虐恋故事，就此展开。

A traumatic childhood experience leaves Cha Do Hyun, suffering from memory loss and dissociation. The latter has resulted in the creation of seven distinct personalities. Wanting to regain control over his life, he asks Oh Ri Jin, a first-year psychiatric resident, to help him, but she eventually falls in love with one of his personalities. Ri Jin’s twin brother, Oh Ri On, a famous mystery novelist, investigates Do Hyun and his family.