Min Ji-Soo met Cha Woo-Sung when she was young and loved him so much. Woo-Sung though could not stay with Ji-Soo due to his ambitions of one day destroying the President of JS Company who devastated his family. Because of this, he dumps Ji-Soo and goes to England to study. Ji-Soo is pregnant at the time and decides to keep the baby. Ji-Soo becomes a single mother and then marries Bae Ki-Cheolwho loves Ji-Soo unconditionally.
Meanwhile, Woo-Sung meets Lee Sun-Mi in England and they become a couple. He comes back to Korea and eventually meets Ji-Soo again. Woo-Sung realizes that he still loves her, but he can't give up Sun-Mi and her wealth. Woo-Sung then contemplates killing Ji-Soo, but he doesn't realize it's really her twin sister Min Ji-Won.