I found out about Murder My Sweet a while back in this article at Tor on Chandler adaptations. Since The Big Sleep and The Long Goodbye (which gets wrongly dissed in the article) are two of my favorite films, I wanted to check out this, since Chandler claimed Powell was his favorite actor to portray Marlowe.
Marlowe is hired by a thug just out of jail to find his ex-girlfriend. He’s also asked to accompany a guy who is afraid he’s walking into an ambush. Surprise! He was. The guy is dead, the police suspect Marlowe, and all of a sudden there’s a vampy blonde and an earnest brunette, and things get complicated and shoot-y. Good stuff.