My copy is a digital file that plays on a HDTV as widescreen. It has a logo "Letv" so I suspect is was recorded from a television broadcast. I do not recall how I acquired it. The dialog is Chinese and there are no English subtitles. I do not speak Chinese.
The movie starts with cartoon animation over the opening credits. Next Polly and her friend, Samuel Hui Koo-Kit, await an arrival at the airport. They meet a man and in the next scene they are working at a restaurant. There was a gag involving the language barrier but I didn't get it. They take a trolley and foil Chin Yuet-Sang the pickpocket. His gang accosts them on the street. The female pickpocket victim and her martial arts teacher come to finish the fight.
The first fight was at about eleven minutes into the movie. It was comedic and the execution was sloppy. She spars with Idemura Fumio and that fight was good. The next fight is a brawl in the restaurant and back to sloppy. The final fight lasts about five minutes. It is also a sloppy brawl.
Polly has a photo of a girl she seems to be looking for and that seems to be the plot. I can't discern anything more without understanding the dialog.
Yes, Polly did appear in a similarly title movie 1973 "Back Alley Princess" with Angela Mao. I reviewed that movie as below average. Polly has been around since 1967 "Dragon Inn". I also reviewed that movie as one of the best martial arts movies ever made. This movie marks the low point of her career in retrospect. She and Samuel play in full blackface in public at about the eighty minute mark. In 1974 this was comedy but times have changed .
I rate this movie below average and cannot recommend it. After watching it once to write my review I doubt I will ever watch it again.
