Sim Chung-Yi possesses an extraordinary sense of sight that allows her to identify thousands of colors. She also has a vibrant personality. Sim Chung-Yi meets Ma Poong-Do, a talented pianist. Although he excels at playing the piano, he faces criticism for lacking sensitivity. Sim Chung-Yi and Ma Poong-Do develop a romantic relationship. Sim Chung-Yi also seeks to uncover a secret about her father.