In the 1940s near the end of the Taiwan under Japanese rule, an unnamed teacher (Atari) dispatched to the southernmost town of Hengchun, Pingtung falls in love with a local girl with the Japanese name Kojima Tomoko (Liang). After the Surrender of Japan, the teacher is forced to return home as Taiwan was placed under the administrative control of the Republic of China. On his trip home, he pens seven love letters to express his regret for leaving Kojima Tomoko, who originally planned to elope with him to Japan.