This love should have lasted for ever

Sayo and Keiji have eloped to New Zealand to marry, away from the interference of Keiji's disapproving mother in Japan. On their honeymoon, they have the freedom to express their love away from her repressive influence. However, on what should be the happiest of days, Keiji is drowned and Sayo must, by custom, return to live with her cruel and selfish mother-in-law.