Based on the longest-running web-based cartoon series "Ma Eum Ui Sori" written by Cho Seok, "Sound of your heart" is a story about Cho Seok and his strange family.
Park Cha Oh Reum works as a rookie judge. She is in her mid-20's and follows "an eye for an eye" principle. She does not accept prejudice or blindly follow authority. Dealing with cases, she and her colleagues, including Im Ba Reun, grow as people.