It's the soundtrack to the lost Cowboy Bebop episode. It's Lady Love Dies does 1950s New York. It's noticing the almondy finish on the chambourcin you're sharing with the attractive foreigner (who you couldn't quite place until just now but who reminds you of your wetwork in Rhodesia), and smiling back at her anyway because the diamonds are already safely in post.
Smooth, stiring, with just the faintest of undertones suggesting imminent, passionate, conclusive action. Beautiful stuff.