San Francisco, 1980. 72-year-old Guo Xue Hu runs into Xing Xiong, the son of his old friend Yi An, who comes to deliver a letter his now-deceased father had left addressed for Xue Hu. While speaking to Xue Hu, Xing Xiong discovers he knew very little about his father. Xue Hu reminisces about when he met Yi An in Dadaocheng in the 1920s and through his words, Xing Xiong gets to learn about his father, about Yi An and Ru Yue's tortuous love, and the turbulent times of Japanese-occupied Taiwan.