Shuichi (Tadayoshi Okura) had a motorcycle accident 4 years ago. Because of the accident, he lost the last year of his memory. One day, at a friend's wedding, Shuichi has a fateful meeting with Yoshimi (Mirei Kiritani). They enjoy happy times together and Shuichi thinks about marrying Yoshimi. Then Yoshimi becomes sick. A sad truth is hidden in the lost memory of Shuichi