Righteous Love[1] (Korean: 일리있는 사랑; RR: Illiinneun Sarang; lit.

[5][6] Jang Hee-tae (Uhm Tae-woong) and Kim Il-ri (Lee Si-young) first met thirteen years ago when Hee-tae was a substitute biology teacher at an all-girls high school where Il-ri was a student.

But when Il-ri is left seriously injured after a car accident in which she tried to save him, Hee-tae resigns from the school.

Seven years later, they meet again by chance, fall in love, then get married and have a typical, happy marriage.

Now a marine researcher on fishery, Hee-tae one day discovers that his wife is contemplating having an affair.