Yongsun is a single mother and one day she sees a woman on the news who is just like an adult version of her baby girl, whom she affectionately calls little bee.

The woman reported the clinic where Yongsun did her insemination for changing the mothers'' eggs and using random ones.

Shocked and confused, she wonders what is the best thing to do for her daughter. 

Yongsun also gets curious about the stranger, who is the biological mother of a child she doesn't know that exists.