Lee Da Hee's agency stated, "Lee Da Hee's refined look and intellectual image will perfectly portray her character in the drama. She will show her acting for the melodrama that she hasn't shown in 'I Hear Your Voice'."

She'll be playing the role of Shin Se Yeon who expresses her loneliness and desire for love.�

The melodrama will portray the 'secrets' that unfold when Min Hyuk (Ji Sung) falls in love with Yoo Jung (Hwang Jung Eum), who killed his former girlfriend.�'Secrets' will premiere following 'Knife and Flower' on September 11.