Sachi is the owner of a piano bar. She is a single mother and her son is Takashi. One day, Sachi receives a phone call that her son Takashi died from a shark attack in Hanalei Bay, Hawaii. He was surfing in the bay area when a shark attacked him. His foot was bitten completely off by the shark. Sachi heads to Hawaii.
Jong-su bumps into a girl who used to live in the same neighborhood, who asks him to look after her cat while she's on a trip to Africa. When back, she introduces Ben, a mysterious guy she met there, who confesses his secret hobby.
Toru recalls his life in the 1960s, when his friend Kizuki killed himself and he grew close to Naoko, Kizuki's girlfriend, and another woman, the outgoing, lively Midori.