Wrongfully accused of a crime she didn't commit, 13 year old Guadalupe Santos is sentenced to 30 years in jail, while in jail she gives birth to a baby girl who is taken from her by her older sister Milagros. 15 years later she escapes jail and meets with Daniel Moncada who turns out to be the brother of the man she was accused of killing.

Na-Yeon is a bright woman. She supports her boyfriend Tae-Joon, who is from a poor background, and has even given up entering a university. But Tae-Joon dumps her for his success and goes with Se-Jin, who is a granddaughter of Baekdoo Company president. Do-Hee is Na-Yeon’s twin sister. She is arrogant and tough. Do-Hee works as a reporter at a weekly magazine. After Na-Yeon’s death, Do-Hee decides to take revenge. She takes on the identity of her sister Na-Yeon. Do-Hee then meets Hwi-Kyung, who is successor of Baekdoo Company.