Hong Ji-Won (Bae Jong-Ok) grew up at an orphanage. To escape from her poor background, she studied hard and graduated from a prestigious university. She then worked as a secretary at a large company. Finally, Hong Ji-Won married the owner of the company and gave birth to a son. Now, Hong Ji-Won learns that her son has a disease. She decides that she will do anything for her son.
Son Yeo-Ri (Oh Ji-Eun) was raised by wealthy foster parents, but she is abandoned by foster parents and her boyfriend. To protect her child, Son Yeo-Ri goes to prison.