On August 9, 1945, the United States dropped an atomic bomb on Japan. Koji (Ninomiya Kazuya), a young man studying at a medical university, died without any warning. Three years later, Koji's mother Nobuko Fukuhara (Sayuri Yoshinaga) seemed to gradually admit the fact that her son was no longer in the world. Her husband and two sons had all passed away, and she had gone through the difficult years alone with the support of faith. One night, Koji suddenly appeared beside his mother. Nobuko was overjoyed and had a warm conversation with her son. Koji did not improve his personality and talked and laughed with his mother. Of course, he had another reason to linger in the world, that is, he was worried about his fiancée Machiko Sado (Kuroki Hana) who was in love with him. Machiko is now a teacher in an elementary school. She is obsessed with Koji and has delayed her marriage for this. The dead and the living, their bond is still close...