Grown up in an orphanage, Hong Ji Won is trying to escape her poor background by graduating from a prestigious university. Now landed a job as a secretary with a large company and married to it's owner, she learns that her son she gave birth to carries a disease. She is now fully dedicated to do everything for her son.

Raised by wealthy foster parents, Son Yeo Ri is later abandoned by them and her boyfriend. To protect her child, Son Yeo Ri is forced to go to prison.