A Trap (1965)

When her only relative, her elder brother is accused of robbing and murdering an old woman loan-shark, pretty, young Kiriko travels from her home in Kyushu to Tokyo to get Japan's top lawyer to defend her brother. Unfortunately her naive idealism is shattered when the lawyer refuses to take the case based on her insufficient funds. What follows is a long determined revenge plot that sees the heroine become a Tokyo bar hostess and worse to punish the lawyer. The plot thickens with another murder mystery and a sleuthing reporter.