The 50-year-old office worker Hirohiko Sakamachi (Guichi Nakai) unexpectedly ushered in an unexpected visitor-Tozawa Meizhi (Bobo). Meizhi, a college student, is volunteering in the "Masters Jiaziyuan" department of the Jiazi Park Bureau. She is also the biological daughter of Sakachi's high school baseball team teammate Yuo Matsugawa. New Year's Day wrote greeting cards to his teammates every year for the past 27 years, but never sent them until he died in the March 11 earthquake last year. Mizhi sincerely asked Sakamachi to enter Jiazi Garden on behalf of Kawakawa College, and hoped to know more about his father's life story. With mixed feelings, Sakachi found old teammates such as Naoki Takahashi (Toshiro Yanagi), and when they were determined to put an end to the regrets of that summer, a secret that had been hidden for a long time also quietly emerged. This film is based on the original work of Chong Songqing.