Chet baker recorded the tune many times.
Basically, it's a minor blues with a twist.
The descending II-V's lead you away from the minor key center, but finally lead you back to it.
Nothing fancy harmonically speaking, but it's nice to play it.
As always, you can download the tune HERE. If you load it and you don't have the appropriate Jazzstylezz style, it will say "style missing". But you can always substitute it with any other style of your liking.