Lee Kang Joo is a single mother who was abandoned by her previous boyfriend, Yoo Ho Nam. Ho Nam forgot that Kang Joo was pregnant with his child and went abroad to study. When Ho Nam returns to Korea, he wants to pick up where he left off his relationship with Kang Joo. However, Kang Joo, is not as willing to start over with Ho Nam. Choi Seung Hun is the son of Jung Soo Hee who is Kang Joo's mentor and boss. He has been pursuing Kang Joo for a while and hits a roadblock when Kang Joo's ex returns.