Takeshi Island, located in Okinawa, is far away from the hustle and bustle of the city. Time flows slowly here, and nothing seems to awaken her long dream that has lasted for thousands of years. The maiden Anli Fengxi (Seijing is acted the role of) and her grandfather (Ping Liangjin) live together and live a quiet life. As if she inherited the gift of her late father, Fengxi loves photography so much that she is always looking forward to going to metropolitan Tokyo to realize her dream of becoming a photographer. In addition, she also hopes to see her mother (Nanguo Kun) who has been away for many years in Tokyo. Since Fengxi was 7 years old, her mother has left her. From then on, all the memories of her mother were the letters sent every year on her birthday, and the warmth and kindness between the lines accompanied her for more than ten years. Mother once promised that Fengxi would tell her the secret of parting on her 20th birthday. This time has finally come. What kind of answer will be waiting for her?