Scarlet Letter(2010)

Original title: 주홍글씨

Successful television screenwriter Kyung-seo's life spins out of control after she accidentally kills her best friend's fiancé. Four people paying the consequences for a love that went wrong. One woman endures poverty and a guilty conscience while the other woman plots revenge after her career takes off. Then a twisted fate brings the two women back together. Four people stained by adulterous affairs.