Ditto is a 2000 South Korean science fiction and romance film directed by Kim Jeong-gwon. The plot of the film is similar to that of another movie released in 2000, Frequency, in that two people separated in time are somehow able to talk to each other using amateur radio. In Ditto, the people in question are two students in the same school, one in 1979, the other in 2000.
The film begins with Yoon So-eun (Kim Ha-neul), a student at Shiji University eagerly awaiting a certain student Dong-hee (Park Yong-woo) returning to school after serving in the army. She meets him outside the amateur radio club room, where she tells him HAM radio is her hobby, and he thanks her for all the letters she wrote him during the war. Visiting her friend Sunmi-Hur who is recuperating from a broken leg in the hospital, So-eun tells her she is in love with Dong-hee.
At home, one night, she is awakened by a call on her radio, from another radio enthusiast, Ji In(Yoo Ji-tae). They discover that they attend the same university and plan to meet in front of the school clock tower, where Ji In offers to lend So-eun a book for amateur HAM radio operators. At the set time, both wait for the other, So-eun in front
(This is information generated from a Wikipedia article, licensed under the GNU Free Documentation License.)