Kaori, the principal of Tanimoto Gakuen, a major player in the beauty industry, is aiming to expand into Shinjuku in order to make further progress. However, she is overtaken by the president of the Beauty Association and others. Then, a mysterious man, Segiyama, appears before her. He tells Kaori that he will take back the rights to the salon in Shinjuku in exchange for campaign expenses.
Leaving his wife in Osaka, Honda leads a double life in Tokyo – after spending the day as an elite businessman, he flirts around in the evenings. He even rents a secret apartment where he keeps record of his girl hunts in his diary, the ‘Hunter’s Diary’. One day, he finds an article in the newspaper – a murder of a young woman in his diary. A few days later, another woman from his diary is murdered. He soon finds himself in a labyrinth of fear, as women named in his diary are killed one after another...