Scarlet Letter(2010)

Scarlet Letter is a South Korean drama that follows Kyung-seo, a successful television screenwriter whose life unravels after she accidentally kills her best friend's fiancé. The accident sets off a chain of consequences for four people entangled in a web of love gone wrong. While Kyung-seo struggles with poverty and crushing guilt, her former friend rises to success and begins plotting revenge. Years later, twisted fate forces the two women back together, reigniting old wounds. The series explores themes of adultery, redemption, and the price of secrets as these four characters navigate the fallout from their past mistakes. Guilt and vengeance collide in this intense examination of how one tragic moment can reshape multiple lives forever.