Terumi has no memory of her life leading up to when she nearly drowned as a child in her town's local lake, Lake Shoryu. Terumi has been supported by her family and her close childhood friend Yukio since that time, although her family also does not seem to understand the reason for this childhood incident. 12 years later, Terumi finally decides to leave her town for a new job, but before doing so, begins investigating the drowning incident together with Yukio in order to know the truth. During her investigations, Terumi meets a man named Soda, who seems to have the same experience of nearly drowning and recovering with no memory as she does. As she digs deeper, a strange relationship between her and the legend of Lake Shoryu begins to surface.

A depressed middle-aged man takes up surfing after he retires.

Ayako is a housewife who spends her days nursing her father-in-law and taking care of her husband, bumps into her former lover Keisuke, who is now married and has became a cleaner. When Ayako was a junior high school student fourteen years ago, she was involved in a forbidden love affair with Keisuke who had been a teacher at the time.

High school student Mio (Mari Iriki) lives in Kagoshima. Since her novelist father was lost, she has refused to go to school and lived on her father's yacht, which is anchored at a dock. Kiyomi (Asami Tanaka) likes yachting, because of her father's influence back in her childhood days. During a practicing yachting, Kiyomi lost her friend and she also quit her special yachting school. Kiyomi then transfers to a regular high school. Finally, these two girls meet.