A story about the hospital, Jejoongwon. It was the first modern hospital in Korea established in the Joseon era in 1886.

Kim Ji-su (Uhm Jung Hwa) is a 31-year-old single woman who once wanted to become a famous pianist like Horowitz. Her dream was shattered but she was able to go on by teaching children to play piano. One day, she discovers a young boy Gyung-min (Shin Ui Jae), who is a musical genius. She starts to give him intensive music lessons, preparing him for competition, but it does not turn out well. But later, when all seems lost, Ji-su is utterly shocked when she realizes that Gyung-min carries a secret that will change her life forever.

Reminiscent of the film FREQUENCY, DITTO follows high-school students So-eun (Kim Ha-neul) and In (Yoo Ji-tae) as they realize that they can never be together. So-eun, living in 1979 South Korea, begins making transmissions on a ham radio and contacts In, who unbeknownst to her lives in the year 2000. The two find that they attend the same high school, and still not aware of the time warp, strike up friendship and a romance. In addition to the timeless love story, this film is significant in its exploration of cultural identity and politics.