The story is about Ayako's fall in society when she accepted her boss's indecent proposal in order to raise money to save her father.
This film is part of the Criterion Eclipse Series 13 boxset also named as Kenji Mizoguchi's "Fallen Women". The other titles are "Sisters of the Gion", "Women of the Night" and "Streets of Shame".
Liked the nice storyline that explained Ayako's actions due to her circumstances! Thought she celebrated a little bit too soon towards the end though.
Internet Movie Database Link