位于冲绳的竹富小岛,远离了城市的喧嚣与聒噪,时间在这里缓缓流淌,似乎没有什么能惊醒她绵亘千百年的长梦。少女安里风希(蒼井優 饰)和祖父(平良進 饰)居住在一起,过着波澜不惊的生活。仿佛遗传了亡父的天赋,风希如此热爱摄影,她时刻期盼前往大都会东京,实现成为摄影师的梦想。在此之外,她还希望能在东京见到阔别多年的母亲(南果歩 饰)。 自从风希7岁那年,母亲便离她而去。此后关于母亲全部的记忆只有那一封封每年生日寄来的信,字里行间的温暖与慈爱伴她走过十多年漫长的岁月。母亲曾经允诺,在风希20岁生日那年将会告诉她离别的秘密,这一时刻终于到来,等待她的将是怎样的答案?Fuki who lives with her grandfather Shoei in Taketomi Island, Okinawa, dreams of becoming a cameraman. In her childhood, her mother Masami left Fuki to live in Tokyo. Although Masami has not come back, Fuki receives birthday cards from Masami every year on her birthday. On Fuki's fourteenth birthday, Masami promises to confess everything when Fuki becomes 20 years old. After her graduation from high school, Fuki moves to Tokyo to work as a cameraman assistant. Fuki starts off her hectic life in Tokyo, and soon, her nineteenth birthday comes. As usual, she receives a birthday card from Masami. A year later...