Tachibana Misaki, who moved to Tokyo from Amakusa after graduating from high school, is now a top photographer in the fashion photography industry. She has gained the trust of top Italian designers and is trying to solidify her position. However, there is something that has been bothering Misaki lately. That is, her eyesight is deteriorating. Misaki, who was originally aware of her mild color blindness, undergoes a detailed examination at a university hospital at the recommendation of her regular ophthalmologist, but is told that she has an unexpected disease. Misaki, who is at a loss as she faces a situation that could be fatal for her as a photographer, receives a letter from her younger sister, who she has not seen since moving to Tokyo, saying that she wants to see her. Misaki takes a leave of absence from work and disembarks at the port of her hometown, Amakusa, for the first time in 18 years.