Ji-yeong has a biking accident and is aided by a boy who is practicing to become an Olympic marathon runner. The young man falls ill during a practice and is forced to give up his dream due to a previously undiagnosed heart disease. Ji-yeong wants to help him, but her parents don't allow it, so she steals a camera to pawn for the money for the boy's hospital bill.

Choi Seok, a historian, raises Jeong-im after her parents pass away. But when her gratitude turns into feelings for him, he is criticized and so leaves the school. When Jeong-im is hospitalized, he gives her a lump sum of money and leaves for Hokkaido, Japan. When Jeong-im finds out the truth, she and Oh Jin-wu, an admirer of hers, go to Choi Seok who's now fighting brain tumor...