The love story of a single dad, Kang Poong Ho, who raises his 7 year old son alone after being abandoned by his first love. By day he works as a pest exterminator and by night he is a martial artist. His first love is his son's mother who is a cold and proud woman who left her family to study abroad as a pianist. Jeon Ha Ri, is a girl from a wealthy family who falls for Poong Ho.
