The Man I Love(1946)

There should be a law against knowing the things I found out about men!

Tough torch singer Petey Brown, visiting her family, finds a nest of troubles: her sister, brother, and the neighbor's wife are involved in various ways with shady nightclub owner Nicky Toresca. Petey has what it takes to handle Nicky, but then she meets San Thomas, formerly great jazz pianist now on the skids, and falls for him hard.