Yumiko Kurahara

While in vacation in a sea side house, a young man fall in love with a beautiful woman who pretends to live by herself in the sea. The fishermen of a nearby village think she is a monster, the female of a shark killed many years before, responsible for many disappearances.

Yoshikawa and Kaji are alumni - Yoshikawa leads a life loyal to his company Toho Corporation, whilst Kaji works in the underground world for Aoyama, a fixer trying to buy Toho out. One day, Yoshikawa is ordered to take a look into the information leakage which had resulted in a serious fall of the company stock price. Following his order, Yoshikawa reunites with Kaji but their relationship gets complicated through the presence of Akiko, the daughter of Kubo, chairman of Toho Corporation. There is an obvious financial conspiracy and several men are killed - Who is the true mastermind behind all the plots?