Autumn in My Heart

Professor Yoon's couple learns their child has been switched through blood tests after a car accident.

Professor Yoon and Soon Im switch their children, but they only suffer from unfamiliar circumstances.

Jun Seo returns to his hometown and looks for Eun Seo. Eun Seo has an unwanted encounter with Tae Seok.

Tae Seok is upset with Eun Seo going on a blind date for money and takes her to the beach where Jun Seo comes.

Jun Seo feels sorry for Eun Seo growing up in harsh circumstances. Tae Seok's confession bothers him.

Yu Mi notices that the feelings between Eun Seo and Jun Seo are more than brother and sister.