1979, Yin () is a third-year English major at Silla University. She has always had a crush on her predecessor Dong (Park Yong-woo). She longs for a better life, but Dong likes another student. By chance, Sean found an old-fashioned walkie-talkie. One night, another boy's phone suddenly came from the walkie-talkie, and Sean started talking to him in surprise. After the exchange, Sean found that these boys are also studying in Silla University, and their name is Chi Ren (Ji-Tae Yoo). The next day, the two met under the bell tower. Sean waited hard, but the other party didn't show up. Chiren by the car can't wait for Sean to come in the heavy rain. When we talked on the intercom at night, we were all blaming each other. It was the next night that they realized that they came from different time and space. Sean lived in 1979, while Chi Ren lived in 2000. Conversations across time and space amaze each other. That night, they poured out their feelings to each other, and unconsciously, their feelings deepened. Chi Ren told me that his parents are also students of Silla University, which is the kindness and beauty of Dong and Dong's lovers. ...