Yu Kyung is a successful woman who is proficient enough to become an executive director of Chunha Group when she started as a secretary. She recently found out her daughter is alive, so she plans to get her back and take her revenge. Meanwhile, Hye Soo is a strong girl who faces challenges head-on. She has a daughter with Ji Ho, and she would do anything for her. However, she gets tragically betrayed by Ji Ho, the love of her life, over power and money. How will those two mothers end their fierce revenge?