Unknown Woman (Ireum Eobsneun Yeoja)

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.