Lonely hostess Kiyo spends her days propositioning men on the cold streets of Tokyo and being beaten by her violent pimp, Tetsuya. One day her luck seems to change when she meets a charming foreigner named Anchin and a romance blossoms but soon everything falls apart when she becomes pregnant. Upon hearing the news Anchin flees Tokyo. With nowhere left to go she turns to The Viper, a scorned spirit that has been with her since birth.

Nami Matsushima is used as a spy by her first real boyfriend, a police detective named Sugimi, to investigate a drug smuggling ring. However, her role is discovered and she is raped by several drug dealers. It emerges that Sugimi was simply using Matsushima as a pretext to obtain a bribe from the Yakuza. Seeking revenge, Matsushima makes a failed attempt to stab Sugimi on the steps of the Tokyo Metropolitan Police headquarters. She is sentenced to do hard time in a women's prison, where she is given the number 701.